New 6mm Advanced Rifle Cartridge
- Thread starter Gtscotty
- Start date
JP would be a great choice.
Precision Firearms makes a bunch of different options with Criterion, Bartlein, and Krieger barrels, billet receivers, nice handguards, trick muzzle devices, etc.
Cobalt Kinetics has high-end Grendels in the CK-SPR Elite series.
SOLGW has at least a mid-grade options.
If they’re only showcasing sponsored firearms, that would make sense why they haven’t taken a Grendel through that course.
Does anyone have any experience using this in precision competitions? I'm thinking about getting back into that, but my precision gasser is still a 5.56. Yikes. I'm currently weighing my options on 6mm ARC and 224 Valkyrie.
I searched the thread and didn't find this discussion.
I searched the thread and didn't find this discussion.
PRS style. They have some local to me that are kind of PRS-lite, it's a 1-day comp that has a separate gas gun division.
PRS style I would go 6 ARC. Good factory ammo and good loads to load for yourself. You could always try it out with your .223 and get the feel and decide from there.
I put my 6 ARC together for the same use. I just bought a Grendel Hunter upper. Plan to get out soon to a match with it.
I put my 6 ARC together for the same use. I just bought a Grendel Hunter upper. Plan to get out soon to a match with it.
I did the comps with my 223 several years ago (2 new kids and a new business put it on the back burner). I could typically place middle of pack with 77grn SMKs, but it becomes un-spottable after 700m or so. Thanks for the rec, I was leaning toward that.
Yeah the .223 even out of a bolt gun is tough to spot out in the 800+ range. The 6mm is a little easier.
In full-value winds over 7mph, we often have difficulty spotting impacts with 77gr even at 450yds, especially on a plate that has been shot up with no fresh paint background. There just isn’t enough projectile mass or momentum to do much when 5.56 connects with steel. At 5mph and under, it’s a little more perceptible, but still anemic.
For me, after shooting and spotting for 5.56 since 1987, across a wide range of environments and conditions, for DM and steel target work, I really like the 80gr and heavier bullets. 75gr A-MAX/ELD-M is another great one, but isn’t mag-fed compliant unless you crimp the mouth over the ogive. Not exactly ideal, but I’ve seen it done, and it shot surprisingly-well.
But even the 6mm Dasher is hard to spot or hear at 700yds in moderate full-value winds from bolt guns, running hot from 25” barrels.
This is why 25 GT/25x47/25CM are gaining momentum in PRS. Shooting 133-138gr bullets with BCs that match heavier 6.5mm class bullets.
138gr A-Tip has the same BC as a 147gr ELD-M .695 G1/.350 G7
When you hit the plate, the RO knows it and you can still self-spot well with a good brake or suppressor/brake combo.
Another buddy of mine just put his 6mm ARC together with an 18" Proof stainless barrel.
Avg with 108gr ELD-M is 2523fps. Seems to shoot well, nice ejection pattern.
Avg with 108gr ELD-M is 2523fps. Seems to shoot well, nice ejection pattern.
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With Hornady filing with SAAMI for the 25 Creed, I hope it really gets adopted in the AR10 for the reasons mentioned as well as the fact you can load the heavy bullets to mag length (the heavy 6.5’s are either too long or pretty slow at mag length).
That said, I doubt the 6.5 creed is displaced and the 130 Berger ar hybrid is pretty potent from a gasser
Has anyone been able to clone the 108 eld-m factory ammo? Id be really curious which type/burn rate powder they are using. Im guessing an extruded single base?
Pulled some apart to try a Mexican match with an 110 ATip and it looked like CFE223 to me. Similar velocity to my loaded 110 ATips and CFE223 also.
I haven’t tried, been grabbing cases from Battle Hawk Armory whenever I start running low. They were selling 20 rd boxes for $23 a few weeks ago & even less by the case.
Ok thanks. So its a double base ball powder. Maybe something like 2000-MR may also be similar
Never used 2000-MR so can’t really comment but the powder did appear to be a ball powder.
I just put one together with an 18” Proof barrel and SA AGB. Went full mass jp bcg and bolt like proof recommends. Also used scs from JP which is just the standard weight and I can’t even get the bolt to travel out of battery when I shoot. Gas is wide open. It takes considerable force to get the bolt to release and eject the shell by hand. I should be getting my borescope today so I can verify alignment. Hopefully it’s something dumb I did. Also running the huxwrx flow 6k. Not sure how long I’ll be using it though. It’s super loud.
You might need to try a different or lighter buffer, but I had the same issue with the JP bolt. I switched out their gas rings to standard 3 piece rings and that solved it for me.
There’s another really sick cartridge for the AR-10 that crushes all the others performance-wise.
It’s what I’m going to do when I get around to messing with AR-10s again, but I’ll do it in the Savage MSR-10 smaller frame I think.
Imagine 5.8 mils drop, 1.3 mils drift, 1104 ft-lbs at 900yds. Case is shorter than Creedmoor.
1000yds +7mil drop 1.5 mils drift 1637fps 964ft-lbs
I am running the same kit for a year now on both a 18" and 14.5" and I haven't any issues like that, something is off.
Here's a handy blog post about MV from 6ARC vs barrel length: https://www.ballisticadvantage.com/blog/what-is-the-best-barrel-length-for-6mm-arc/
I guess I'd default to 18"
I guess I'd default to 18"
Geissele has updated the price on their mags. Much better...
Now if they were in stock then that would be even better. lol They were smart to do that though.
Gei$$ele claims-they are currently shipping and vendors should have stock available for sale in the next two weeks.
I couldn’t stomach the original price, but may have to try a couple now.
I couldn’t stomach the original price, but may have to try a couple now.
Yeah, I was, and then a while later I wasn’t. They are having host problems. I think I saw a 30 round mag for $59, and maybe a 20 round for $44? Somewhere around that.
I need about 8-10 of those 20 rounders. Hopefully they come in stock soon. Got some gas gun matches coming up.
Agreed. 20 inch proof with heavy JP variable BCG and ‘H2’(?) SCS. VLTOR Upper if it matters. I’d say a gas issue, but if it has issues when you hand cycle it, sounds like something isn’t lining up? You don’t have the buffer spring retainer in do you? I ran an unintended experiment with it in, and that will increase the resistance…
After the break in shots and a total of about 20, with Hornady 108 ammo out of a 20 inch Proof, I’m getting 2566Avg, ES29,S D11.8
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It was an I’m an idiot issue. Definitely a gas problem though. It’s resolved and somewhat tuned now and it’s very nice.
I ran an SLR non-adjustable on my Proof 18" and never had issues. Ejection was weaker with the 80 ELD-VT's but not to a degree where it impacted function. I don't think I could have gotten away with a non-adjustable on the shorter 14.5" I run now.
Just re-barreled my old SPR with a 20" Grendel Hunter 6ARC barrel. I've got some factory ammo to shoot first and might load some after that with Lvr powder/105's.
Is anyone else using Staball Match and 105's with any luck? I've scoured this place and the web and not found much info on SM. I know it will be slower than Lvr but I can't seem to find where many have even tried it.
Is anyone else using Staball Match and 105's with any luck? I've scoured this place and the web and not found much info on SM. I know it will be slower than Lvr but I can't seem to find where many have even tried it.
I personally haven’t tried it but here’s various load data (for gas gun 6 arc) with staball:
If anyone sees these pop up available, please post up. Geissele said they were shipping to vendors/distributors about 2 weeks ago, but I have not seen them available to purchase yet.
Latest version of the 14.5" 6 ARC. I hope this will be the last optic swap for a while.
Don't try the 2-10 version! I have both and for my ARC prefer the 2-10 for sureLatest version of the 14.5" 6 ARC. I hope this will be the last optic swap for a while.
Don't try the 2-10 version! I have both and for my ARC prefer the 2-10 for sure
I hd considered the 2-10x but I was already running the Razor 1-10x prior and I simply needed a bigger objective for more low light capabilities and a better reticle for precision hunting. The 2-10x would be nice on my opticless 14.5" 556 build sitting around waiting for glass but it's likely going to get a NX8 2.5-20x.
Have had all of the above except the Razor and I find the 2.5-20 and 3.6-18 too large on small frames (much better on large frames in my opinion). I'm just trying to convince myself I don't need the new reticle in the 2-10
To each his own. I hunt in extremely shaded, tight cedar lined senderas where light fades quickly in the golden hour. I need a larger objective in order to get more light, no LPVO will offer that with their tiny 24-30mm objectives. I don't use my 6 ARC as an up close run and gun blaster while on the move, it's shot from a fixed position on medium game out to 300-ish yards in typically low light conditions. A larger objective and more top end fit the bill for my needs and other than the optic being slightly longer than the Razor 1-10x it's replacing, the weights are within a few ounces of one another. And I have zero use for a large frame these days so that's a moot point.
Latest version of the 14.5" 6 ARC. I hope this will be the last optic swap for a while.
Flow 6k can?
And I agree as I like the 5-25 on my rifle. I use mine for long range and not close in work also. All comes down to the use.
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