6mm arc velocity vs barrel length reddit. When it comes to the 6mm ARC vs 6.
6mm arc velocity vs barrel length reddit Option one- I can get a pretty good deal on a CarbonSix barrel. Long range: 6MAX cannot accept longer projectiles without critically limiting case volume. That is a little over 28 FPS/inch improvement in velocity 4-6" of barrel means 100+ FPS for one ammo, up to 165 FPS for the other, which is good for wind and good for distance. As far as the 6. 8spc. 5” makes more sense to me it’s a heavier bullet but also higher B. I run a 26" barrel with either a brake of a 4. Since my lgs has 6mm ARC factory ammo in stock and I have 105gr and 108gr pills for my 6mm Creedmoor reloads, I figured why not? Jun 30, 2021 · How to Adopt the 6mm ARC. So how do these two cartridges perform when shooting the same bullet? Dec 1, 2024 · Compare the 6mm GT and 6mm ARC cartridges in terms of specs, ballistic performance, rifling, hunting, and reloading capabilities to choose the best fit for your needs. Looking into 6arc and was curious if anyone has chrono’d 12. Even compensating for the additional 2” of barrel length over Hornady’s published data for an 18” gas gun, these numbers are significantly higher than their data. I get 2525 FPS from Hornady Match. 223 Remington, . 5 G. I’m trying to decide on a barrel. 5 Grendel vs 6mm ARC. May 3, 2010 · At first I dismissed the 6mm ARC because in theory I have everything covered with other calibers. 5” vs. Furthermore, the 6. It also relies on ball powder for velocity. the 20" HD or the 22" STD. 5 Creedmoor) or 30 inches (. Seems to be sourced from Hornady data, supposedly they have MV's in their ballistics data on the Hornady site. For reference, I have chrono'd pretty much every other factory 6mm ARC offering (including the new Black Hills Gold 103gr 6mm ARC) except the HSM 75gr and 95gr. I'm liking the 6mm ARC a lot and thought I'd contribute my data thus far for the cause, because groups like this (looking at you, u/Trollygag) have helped me a lot in the past. Lastly how important is it to have the barrel headspaced to a specific bolt? Get app Get the Reddit app Log In I’m building one right now at that length with a mk14 rail. jpgMore on the 6mm ARC: h IMO, 308 needs all the help it can get on velocity. 750" - 5/8x24 - Front Spiral Flutes - Rock Creek Button Rifling - Bead Blasted Geissele Automatics Super Charging Handle 5. New comments cannot be posted. 56 bullets in a larger capacity case . 18IN, 6MM ARC BARREL, RIFLE LENGTH GAS 6mm ARC 105 gr BTHP Hornady BLACK Seems like it also depends on if its a bolt gun or a semi-auto. 220 Russian and have very similar SAAMI specs. Mine shoots Hornady Black (105grain BTHP) at about 0. 5 Grendel/6mm ARC mags Hi everyone, i am having an internal debate about getting into 6mm arc as another caliber and wanted to ask for professional opinions regarding whether i should take the jump or not. You just have to put that velocity into your ballistics calculator. A place to discuss anything about the new 6mm ARC rifle cartridge. 5" 5. hornady. I've shot 6mmBR out of a 26" at 1000 using my XTC Match Rifle (my old 107SMK load hitting 2775fps average), but it gets bucked by the wind tremendously. It was 22-24" with 224 Valk. Was looking at Suplerative arms piston kit but I only see it offered in as long as rifle. 5", I wouldn't count on it. 223 Rem Speed Varies with Barrel Length — Cut-Down Test. As long as you know what your bullet is going to do you can shoot any caliber and be accurate with any barrel length. Plus you can use the same projectiles as your main rifle. 56 which you would want to have as much velocity as you can. 19 votes, 14 comments. 5MOA and Hornady ELD (108 grain ELD) at like 2. 5 Grendel will be the best choice for larger game. 62x39 due to almost all engagements being less than 100 yards and 7. Hunting: (Deer) They advertised an 87gr Berger at 3000fps with a 24” barrel. Post what you have and ACTUAL recorded velocities. 56) so it retains velocity better after leaving the barrel. 308 Winchester, 6mm Creedmoor and 6. 5G I would be shooting lighter 95-105gr bullets to help offset the loss of velocity due to barrel length and a slightly faster powder, but its seeming like thats a sweet spot bullet weight range for 6arc too. Jan 3, 2025 · Direct: X-Caliber Custom AR Barrel 6 ARC 18” (add Rubber City headspaced BCG for +$200) (with muzzle threads) ($372) Patriot Valley Arms - Osprey 18” 6 ARC barrel with rifle +2 ($399) (add headspaced Rubber City bolt for $125) Shaw 18” HBAR rifle length barrel ($200) Rexus 18” 6 ARC Heavy profile Rifle Length Chrome Moly Nitrided Barrel Feb 24, 2024 · I've got a Centurion 18" 6mm ARC barrel on order. I have 600 rounds 105gr Hornady Black ammo on hand. The 6mm ARC is your best option if you're long-range target shooting and only occasionally go deer hunting because it shoots much flatter than the 6. Barrel:-Is there any reason I wouldn't want to go to a 24" +3 rifle gas bull barrel? Certainly already use to a long barrel on my bolt PRS gun. If accurate, I'm sure one of the links below supports what I'm about to write (sorry, lazy), but I recall that muzzle velocity and force are greater out of a short barrel than many typical AR calibers (556, 300BLK, etc). 241 Then fill her up and top it with a 95 gr Berger My setup is a 22 inch Shaw custom stainless barrel, has a hbar profile I think, get really good velocity with factory ammo but can’t get much better than 2,650 FPS without pressure signs with Tac and varget But it's a relatively slow 6mm cartridge (comparatively speaking) in the AR platform so it is not ideal. . 7 moves the 108 ELD-M in the 2200 fps range. I believe I've settled on a 16" barrel for my next (edit: 6mm ARC) upper. Right now it’s converting 6. are at 50-100 yards. It's one of the reasons my first AR years ago was a Ruger MPR 18" w/ Rifle Length Gas. I was thinking that if i went 6. The extra length of rifle +2 gas port on a proof barrel makes a much nicer suppressed experience. Hello All,I'm looking to get a 6mm ARC complete upper in the next few months. It accepts all the same components as the Grendel, including the magazine and bolt, so all you need is a 6mm-specific barrel. See full list on ballisticadvantage. You’re not going to to get enough velocity out of a 12. Does rifle vs mid length make a difference with this caliber? Will the extra 2” even matter, if I can only shoot to ~800yds? Based on the 4DOF calculator, factory 108gr ELD Match ammo is barely skimming by at 1184fps with advertised velocity from a 24" barrel at 1000m. The terminal ballistics of the 6mm ARC outperform the 6. For the MatchKings, 2357 and 2408. Note: You average about 40-50 fps per inch reduced in length. 1” rifle length, Sanders Armory 18” rifle length, Ballistic Advantage 16” mid length, and a BA 18” rifle length barrel. They will expand/fragment down to about 1600 fps. 5 might be cool for hunting, almost wish I went with that lol I have a 6mm arc with a 22” ballistic advantage barrel and I love it BUT it is very very picky on ammo. Jul 20, 2023 · CLICK HERE for 31″ to 17″ 6mm Creedmoor Barrel Test Report » Similar Posts: 6mm Creedmoor — Barrel Length Velocity Test — 24″ to 16. Aug 20, 2020 · August 20th, 2020 6mm Creedmoor — Barrel Length Velocity Test — 24″ to 16. From 600 to a thousand yards (and probably beyond) the 6mm ARC has an edge over the grendel. But then I realized that I have enough parts floating around to build two more Grendel rifles and I don't really need that. This chart is comparing the trajectories of Mk262 and M118lr out of a 16 in barrel to the trajectory of 6mm ARC Hornady Black 105 gr BTHP out of a 16 in barrel. 002) Then mandrel neck to desired width . The best data comes from studies such as "Barrel Length Studies in 5. May 4, 2014 · Okay so I'm going to build a rifle for steel and ground-hogs, if I want to keep the barrel length 18-20" which load, and/or caliber would be better? Currently leaning toward the 224V, 20" proof and 80-85gr berger loads after doing some reading. I have ars in a multitude of calibers already, from 556 to 300blk to 7. But only 1 manufacturer making only 3 ammo types 6. After my first batch of 6mmARC MONSTER 20" barrels, I'm thinking of going to the 12s even before I do the 16s. What are the drop and wind drift characteristics of a 6mm ARC at 500 yards? With our T&E 6 ARC mini fix we would get 2800 fps with the Factory 80 ELD-VT, 103 ELD-X at 2475 fps and with the 108 ELD-M 2560. The only thing they won’t do is run resized 7. 5G on my DMR, and bought the 21" XL 6MM ARC for another build. 5 is going to sufficiently stabilize any bullet that'll fit in the ARC. The 6mm can use all the speed it can get for dedicated 800yd+ that's the reason for the barrel length. I’ve read the n00b guides by trollygag, hollywood, etc, including the barrel length articles. I’ve never had a piston gun so I’m assuming the op rod wouldn’t be long enough? With a muzzle velocity of 2,800 fps, Hornady Precision Hunter 103 gr ELD-X 6mm ARC ammo can easily drop a whitetail in its track out to 500 yards or pop a coyote out to 900 yards. 338 Lapua). Building a 6 arc for coyote hunting. So the pencil barrel will have higher ergos but the heavy barrel will have higher recoil. 5 Grendel (Type II) / 6mm ARC BCG - 0. Same bolt and magazines, just change the barrel. Parting Shots. These cartridges definitely step on each other’s toes a bit — a 108 grain 6. It's the optimal length to velocity tradeoff. Probably not even an 18" barrel. com Mar 31, 2021 · The 6mm rounds have very high ballistic coefficients (more aerodynamic than 5. the 20 Both the 6mm ARC and the 6. The 3 barrels in the running are: Craddock Precision Signature Series 22" 6mm ARC Rifle +2 gas length Bartlein barrel blank 416R Stainless 1:7. I got my 24" 6. 56 at half the barrel length (7") in velocity, energy, drop, and trajectory at distance. They say a charge of 24. 5-30X56 from u/Tykempster at MKMachining -Magnetospeed V3 Chrono -CMMG lower 42 votes, 49 comments. It is the softest shooting of the three. 504 subscribers in the 6mmARC community. The 6mm ARC delivers comparable performance from a wider array of loads, making it a more versatile choice. 5 CM in 16 inches. The 308 Win fires 0. I’m sure if it shoots like most PR barrels it shoots sub MOA and from reading the only article about 6mm barrel length I found its not losing that much velocity. im assuming ill be getting better velocity and BC with a, for ex, 105gr 6arc load than i would a 105gr 6 The four barrels I am considering are: CMMG 16. This cartridge takes some work. Will be using a Superlative AGB. 5G. Just did some poking around and found this on snipershide: Velocity vs barrel length graph. 300 PRC, . 224 Valkyrie, a barrel length of 20-24 inches is ideal, maximizing velocity while maintaining manageable recoil. I've always liked the idea of maximizing the gas system length, which lead me to theCMMG 16" w/ Rifle Length Gas System. Didn’t see pressure but also didn’t feel like loosing an eye or finger by testing more. 62x39 you can run out of a much shorter barrel like a 10-14” barrel. immediately jumping into a wildcat as the first cartridge will be frustrating, but do able. 14. Looks like 12. 7098" in length. 875" gas 6 arc over 22 arc, especially for PRS. The subreddit for long range precision shooting enthusiasts. com has done it again — conducted a fascinating 6mm Creedmoor barrel cut-down test that reveals how velocity changes with barrel length. 22 ARC. Clearly rifle length however is rifle +1 or rifle +2 going to operate more smoothly, reliably? I will definitely run a Superlative Arms adjustable gas block. 5 Grendel load will be near identical to a 108 grain 6mm ARC load. 2 2170 2255 2330 2400 2460 2520 2565 2610 2640 Varget 26. Chrome-Moly Vanadium (CMV): CMV barrels are a popular choice for precision 288K subscribers in the ar15 community. 5 Creedmoor originate from the . 5grendel over to 6mm ARC Full length size with collet. Anyone have data on velocity for each common barrel length? Also is Proof still the way to go, or should I look into a different manufacturer? If you want a “do it all”, consider the 5. This should help folks get a baseline of what to expect when they are considering building one. However, I have a question about caliber barrel length. 6 ARC is clear winner. 62x39 brass, but all of the factory Hornady Grendel and arc I’ve run is fine. 1″ Our friend Bill Marr of Rifleshooter. 26 inches which is almost half an inch shorter than the 243 Winchester, which is 2. The 6mm ARC performs well with barrel lengths between 18-22 inches, offering a compromise between velocity and portability. 5 Grendel at distance. 5” barrel, but once I get it will have some more info for that length. Velocity. AR15 bolts in ARC and Grendel are weaker than their 5. 5”. 264” for 6. If not for NFA, it would be our standard barrel length as it is optimal. Geissele trigger. 22 Long Rifle rimfire cartridge (5. 18” 6mm arc SPR Rifle length 1/7 416R SS barrel from Ballistic Advantage (believe it come with bleeder block and gas tube -rise iconic 2 stage trigger. The 7" barrel kept Mini-mags and other HV ammo consistently subsonic without a single supersonic crack. Barrel Material. Search Dec 29, 2019 · The free Hornady load data for 6mm ARC and 105-108gr bullets on their site has velocity info on the 12. One of the big issues is the myth that bullets will slow down. For most people with an AR-platform, adopting the 6mm ARC is going to be fairly simple. 6ARC has better velocity, similar energy, and better trajectory than the Grendel, with the added benefit of having a variety of correct-to-bore silencers (many 556 suppressors are bored for 6mm). This 6mm ARC reloading data is intended for use in bolt action rifles safe for I just ordered the new HUXWRX Ventom 762 can and thinking of pairing it on an AR 14. com/assets/pcthumbs/photos/1410997173-6mm-ARC---Velocity-vs-Barrel-Length-infographic. A chart showing differences in muzzle velocity would be awesome. But since their tested ammunition is going to be limited, I also looked at posted data by shooters testing different loads. I have the Odin 18" 6. C which will give more energy down range. 5” vs 16” vs 18” barrel lengths. Feb 29, 2024 · Finding the sweet spot for barrel length is crucial for optimizing the performance of the . -20" Proof stainless barrel -DeadAir KeyMo muzzle brake -Athlon Ares ETR 4. I'm going to part together the upper. My CLE chambered 18” mk12 barrel is around 4500+ rounds of moderate to spicy 75/77gr 5. 8 goes, I did quite a bit of research comparing the 6. 5 Creedmoor Proof stainless barrel for ~$375, so I assume I can get a similar discount on the Proof ones. This is true whether you shoot it from a 12", 18" or 24" barrel. I probably won’t be shooting past 500yrds very often. That’s it. 56 - DDC Grendel Hunter 6. The Craddock barrel is $597 and the Proof barrels are $559. Community funds balance: $60 : Current Projects: Leupold MK5HD 7-35x, Bushnell XRS3, Burris XTR II, Vortex LHT, SWFA SS HD May 11, 2023 · 6mm ARC vs 6. So recently I was hooked on the idea of building a 6mm ARC short barrel bolt action pistol I came across some information on 6ARC that shows this round can be quite capable out of a short barrel even at greater ranges thanks to its good ballistics, and the fact that bolt action 6ARC can be loaded to higher pressure than gas guns. More barrel is always better for external ballistics in all centerfire bottleneck cartridges. 50 MOA. 223 Rem Velocity by Barrel Length — Cut-Down Test Results; How . 6CM cycles beautifully, and gives me the potential for a lot more velocity; however, in PRS my target velocity is 2850-2900fps w/108s and I can reach that velocity well below max load per Hornady data. Looking for some input from the cult. There's a lot of debate out there that seems to mostly revolve around differences in velocity and barrel length (and very little of it seems to be backed up by actual data from someone with a chrono!), and the differences are pretty small. a bolt gun doesnt start losing velocity till around 23-24" For the ELD-M, velocity was 2364 and 2405, respectively, for 24. I am waiting on a 10. You’d still get good ballistics compared to 5. Rifle will be suppressed 100% of the time. 56 but 6. So far the favorite bullet to reload with is a Berger 105grain BTHP with a tangent ogive (BER24428). With rifle length gas the decision between 18 and 20 comes down to the decision between very slightly more recoil and length vs more velocity. 5 6mm as a shorter hunting rifle for yotes and whitetails and some steel ringing. The . 25 twist. I'm shooting 5- 5 1/2"groups @1000 with the Grendel. However, the 6CM seems a lot more picky with seating depth & neck tension when compared to the 6GT even using the same powder & bullet. I’ve been debating on a couple different options. 5 Grendel. 6mm arc out of a 12. Kinda in lust with Sgt of Arms offering. to decide on what barrel length. Generally speaking, I like the 6mm ARC as it gives shooters a great option for shooting or hunting at long distances with their AR-15s. Barrel Length vs. 3 2170 2255 2330 2400 2460 2520 2565 2610 2640 H4895 25. Edit: wins in energy, slightly lower on velocity, and loses on drop. 5 Grendel, . Velocity data compiled from various sources on the internet. Also, I don't think there is anything cutting edge or unproven about 6mm ARC by this point. 5 G and the 6. It seems 6arc is maximized with a longer barrel length if your goal is to "reach out". That is a little over 21 FPS/inch improvement in velocity. JP handguard. I have a couple years behind me shooting . On your AR? It never will. Aug 9, 2020 · The beauty of both the 6mmARC and 6. 5 Grendel has multiple manufacturers including cheap Russian ammo I’m also questioning gas system length. I have looked into a barrel from DTech. 5 Grendel has a shorter case length and less recoil compared to the 308. 5 creedmoor). Ultimately it is reliant on how fast the ammo is out of the barrel you're using, but if you're hoping for 1000m supers out of a 16" or 14. 56 counterparts due to the larger diameter mandating less material supporting base/case head. Oct 25, 2022 · Checking to see if anyone has real world data for 6 ARC velocities for 20", 22", and 24" barrels in an AR. 240 is what I’m going for I think. I haven’t settled on an optic yet but it’ll on par with the rest of the build. Nov 23, 2023 · I looking at placing a order for a Howa in 6mm ARC just trying to decide on what barrel length. At 1000 yards it's a bit weak to detect audibly on steel. but probably no difference on what your describing. 22 ARC is within the range of 18 to 22 inches. Buffer System: Rifle vs A5: Is there a pref on which might be easier to tune/ better for 6arc? Or pref for recoil impulse? sounds awesome. If Criterion is not realistic in that timeframe, does anyone have a recommendation for anther barrel maker? Looking for nitride 18, 20, or 22 inch. 1″ 6mm Creedmoor — How Many FPS Will a Shorter Barrel Cost You?. I am also familiar with the loss in velocity as the barrels shortens and I’m not so much concerned about the ~100ish FPS loss between the barrel lengths. It's just not necessary. The SAAMI max pressure for the 243 is 60,000 psi. In terms of muzzle velocity, this is actually what I cared most about on this range trip. Confessedly, it is heavy, but it sure shoots nice. Oct 25, 2022 · The velocity difference can be up to 100fps on the high side to negative velocity gained if you happen to get a fast 16" and a slow 18". Also have a 308 ar as well. Reloading Primers. I have a 22" barrel largely for paper punching and deer hunting. Curious if anyone has done a barrel length velocity test against other barrels, if not maybe we should start a thread where folks can report their barrel and velocities Currently struggling to figure out exactly what I want, not sure if it’s worth going to a 16-18” barrel for the extra velocity or if 12-14. 26K subscribers in the 22lr community. 5 Grendel, minute differences make each one stand out in certain circumstances. I JUST pulled the barrel and swapped it for a 6mm ARC. 445" Face - 9310 Steel - DLC Coating I’d consider both 6 ARC and 6. We have not observed that trend, and I wouldn't expect most folks to migrate back. It also cycled way better with both HV and SV. 6 ARC has some military adoption and is saami spec. Jun 26, 2024 · I don't think you'd really hurt anything with a 1:7" 6mm barrel, either. Powders. Online-Tutorials. The 26" also replicates my 26" barreled 6GT match rifle. On a 22LR, yes, this can happen. 8 before I got the 6. Shooting 1. With all of those you can hunt, shoot to about 600 yards, and somewhat comfortably maneuver in close quarters (I know it’s possible to make hits beyond 600 but to be honest even for most people shooting beyond Building a 6mm arc primarily for target shooting, possibly hunting. 22 arc being it uses 223/5. 5 twist 5R blanks and I am going to make up a bunch of 6mm ARC chambered barrels and I am curious what people feel is most popular for a barrel length in the 6mm ARC - - I am thinking 20" because it strikes the balance between being carryable and maneuverable, yet long enough to get a decent velocity out of the cartridge. I’ve seriously considered a 6ARC gasser (or two). Theoretically, it should outperform a 14. Cartridge Specs 6mm ARC (Gas Gun) 108-110gr 6mm ARC Max Charge Velocity vs Barrel Length (inches) POWDER MAX CHARGE 12" 14" 16" 18" 20" 22" 24" 26" 28" IMR8208-XBR 25. My comparison showed that up to 600 yards, the 108gr 6mm ARC and the 123gr 6. Why does the length of the barrel vary with the caliber so much much? With Savage it's either 26 inches (. 56-platform compatible cartridge, similar to the 6. There’s a reason all the gamer cartridges are throwing 105-115 6mms - you can get heavy 223s or wildcats in bolt guns and the 6mm dominates for a reason. The 12" barrel only runs 10fps slower than the 16" -- a negligible difference. Jan 16, 2025 · Length: For the . A 32" barrel has speed advantage on a 16 ro a 20 or a 24". An 18 will shoot VERY soft. Where is the point of diminishing returns on the 6arc barrel length? Looking to data on the 224 Valk, it was at 22" that the round ran out of steam… Final Shots: 6. They advertise it should be 2750 FPS from a 24" barrel. With hand loads we cranked the 80’s up to 2930 fps before stopping. When it comes to the 6mm ARC vs 6. For self defense I’d look heavily into 7. The primary thing to note with 6mm is that the heaviest projectiles loaded for these are around 110 grain, with a sweet spot between 90-108 For 6. 7 and 25. 5 Grendel 6 arc is good to maybe 1200 yards, 6. 5G bolt. If you build it right, it will be a tack driver. The differences between 308 Winchester and 6. No hogs around these parts, but I would think a hunting sceario would also favor a longer barrel for accuracy. Jun 19, 2020 · CALIBER: 6mm ARC; BARREL: 20”, 1:7. I was looking at two different complete uppers, a 16" & 18" both have… Hello I plan on building a 22 creedmoor ar10 but I can't find any velocity numbers for an 18 inch barrel for 77 to 90gr bullets I would appreciate any help with this Locked post. May 11, 2023 · 6mm ARC vs 6. But I’d choose a 18” at least for 5. Barrel Length graphic: https://press. The 6mm ARC delivers substantially less felt recoil allowing shooters to call their own shots. JP bolts are supposed to be The overall length of the 6mm ARC is 2. Softer then a 20 because of how close the gas block is to the end of the barrel. Difference between Duramag 10 and 5 round 6. For comparison government profile m4 barrel weights 29oz and a similarly length pencil barrel weights 19oz (results in more recoil) with 20" barrels in an m16a2 a pencil barrel will shave off about 1lbs in weight. Ideal Barrel Length for 22 ARC. 56 NATO Weapons" by Dater & Wong (2012), as well as DOD tests for short-barreled rifles. 1 MOA with ease. 62x39 to 6. 5 Grendel, it’s generally 110-130. 224 Valkyrie. 5 Grendel will drop medium game at whatever you consider mid-range. 5 Grendel are the diameter bullets each rifle cartridge fires, the overall case length, and felt recoil. looks like a blowback semi-auto will loose velocity after about 12" or so. 7 2170 2255 2330 2400 2460 2520 2565 2610 2640 TL;DR version is: It doesn't matter. I’m trying to decide on a 22” vs 24” barrel for my first long range build (6. I think that the 18" ARC will easily group sub 5" @ 1000 with the right shooter because it shoots flatter and has higher velocity the the 6. This range offers a balanced compromise between velocity, accuracy, and handling. Anyone see any issues with the parts list I have provided above? Any problems I should expect when it comes to grind time? Thanks for your feedback Oct 24, 2024 · Didn’t see a threads specifically for 6 ARC, so figured I’d get this going for people to share velocities and barrel lengths on their 6 ARC. 300 Winchester and . Max pressures for 6mm ARC in a gas gun shouldn't be showing any pressure signs on the brass as 6mm ARC is rated for 10k psi more than what gas gun loads generate. 5" suppressor (Area 419 Sidewinder and Maverick, respectively) on mine, and don't find the length all that much of an issue. 5 Grendel, but chose 6mm ultimately. My 20 in will ring steel all day long at 900 yards. if you insist on a 6mm wildcat, id do 6x45. What is the optimal barrel length for a 6mm ARC? The Hornady 6mm ARC typically has a 16-18 inch barrel. Welcome to r/AR15! Share you builds, ask relevant questions, play nice etc. 6×15mmR - metric designation) is a long established variety of… They measure thicker/heavier in all directions compared to a standard 6. velocity test results. Based on insights from experts and real-world testing, the optimal barrel length for the . 5 Grendel up to 1000. The 6mm ARC or the 6. very little recoil, and with factory 40 grain ammo, you can get a max point blank range of 300 if you zero at 250, with a retained velocity of almost 2700 at 300. CMMG Rifle Length Gas Tube Craddock Precision 18" 6ARC - Stainless - 1:7 - Rifle - . 5” barrel to see the benefit of . 56. Doesn't matter if it is a . I’d have to check mandrel may be . Honestly I was between 6mm ARC and 6. 2. 5 twist, 6mm ARC, MT 416SS, SBN; MUZZLE: MUZZLE: SV Brake, threaded 5/8-24; GAS PORT LOCATION: Rifle Length with SLR Adjustable Gas Block (my test rifle did not have the adjustable gas block as it was an early production unit) RECEIVER: Forged 7075-T6 AL M4 type upper, AR15 type lower I have a bunch of Bartlein 6mm 5R 7. 223 Rem, a 6ARC, a 308 Win, or a 50BMG. 308” diameter projectiles compared to 0. 1:7. The 6mm ARC is a 5. 56 in 16 inches, 6mm ARC, 6. I will admit this is better than a 5. 5” is reliable to 1000yrds. 308 in 16 inches, or even 6. 136" Depth - 0. 5 Grendel is that sleek, high BC bullets do well in short barrels cuz they rely, not on muzzle velocity, but on ballistic coefficient to retain velocity downrange. I would go with a 58 or 75 grain VMAX right now as the velocity out of a short or long barrel is still crazy fast. It’s no bueno. 6mm ARC vs 308. 16” Proof stainless AR barrel, suppressor, factory ammo They come various barrel length vs. I've seen plenty of chrono data to back that up, and seen plenty of longer range use to come to the conclusion that 50fps (a pretty safe rule of thumb velocity gained from 2") means very little. 56 and it’s not lost velocity or any accuracy thus far. The 18” Proof barrel calls for a rifle plus one gas system length. 5G (both ELD Match) are damn near identical. Here's what I can tell you about . (Bumps shoulder . true. 6mm-arc-rifle Anybody have the scoop on whether Criterion may be working up some 6mm arc barrels? I am perfectly happy waiting, but I will probably start seriously looking to buy in the next 3 - 6 months. iinn hlx ihad zyqnq iysdhe znf nxtmd xuyt xvan injni wueglkj wssnera vndu ebehm yyq