Any interest in a 6mm AR barrel group buy?

[Huckleberry75]

Is there any interest in a 6mm AR/ 6 grendel barrel group buy? I have been looking for good options for an 18" rifle gas in 8 or 9 tw, and got to thinking that surely I am not the only guy looking. Thoughts?

[Popeye212]

Looking also got some extra parts laying around and have the brass. So why not.

[StoneHendge]

https://columbiariverarms.com/configure-...r-243-lbc/

There is no SAAMI spec for whatever you want to call it, but BHWs throat should mirror the 264 LBC which was designed around 123 SMKs. I'm hoping that translates into good performance with 95 gr SMKs and reports are that it will. I'd at least have my 18" 1:8 middie broken in by now if the Libtards hadn't closed down all of the county ranges. Hoping to find a decent spot in the National Forest to give it a try Sunday. Hopefully I freak out some local libtards and Denverites - they asked for it.

[grayfox]

HBerry what are you thinking? BHW or some other? and... 18"? most of the ones I see (window-shopping) are 20"... Don't know if I would have a pref or not, maybe might lean more to a 20"-er... Don't think I would want to get into any "R+2's" or longer ones...

Edit: FWIW, R Johnson on the BHW 6mmAR reloading page says <20" is not good.
"#5 As far as barrel length, below 20" is not advisable. Velocity loss is more than acceptable. 24" barrels and light bullets will run at 22-250 velocity."
Read more: http://blackholeweaponry.proboards.com/t...z5LH4ND8BE

[Popeye212]

20" would be the minimum for me actually thinking about something longer in that caliber also.

[hill37]

Could someone set up a poll as to what type: plain neck down or Improved chamber, barrel material, profile and length and other details ? Then we would have something specific to ask for.

[Huckleberry75]

I am planning to run 70-85gn pills for varmints, and prefer to keep things around 18-20" before I add 6" of suppressor. I may be better off just ordering a barrel, but thought I would see if there was enough interest from others to warrant the efforts of a GB.

[bj139]

I have been suggesting this chambering for a while for a group buy.
I would get one if there was a group buy.

[Popeye212]

I would also

[hill37]

Call for Frontier Gear!

[StoneHendge]

Well someone should call BHW/Columbia River Arms.Biggest problem would be figuring out what twist rate would make everyone happy.

[Huckleberry75]

I spoke with PF and they recommended 8tw, which makes sense to me. It should stabilize about anything that would fit in the mag length.

[StoneHendge]

I spoke with PF and they recommended 8tw, which makes sense to me. It should stabilize about anything that would fit in the mag length.

There are too many bullet options to have a one size fits all twist. 1:8 isn't fast enough for 105 Hybrids.

[ATTACH=CONFIG]12263[/ATTACH]

Conversely, I have great success at long range with 70 gr NBTVs in 6x45 with 1:10. 1:9 would probably be okay, but I wouldn't want to spin a thin jacketed varmint bullet any faster than that. It'll hold together but accuracy will suffer getting out past a few hundred yards.

[JASmith]

Regarding twist rate, there are arguments for going with a twist that stabilizes the longest and heaviest bullets.

Yes, the lightest bullets may be spinning faster than they need to.

The case volume for this cartridge is almost certainly too small to drive them into the lead puffball mode.

That keeps flexibility in bullet choice high — a consideration for group buys where folks may have slightly different interests in what their shooting styles will be.

[hill37]

Columbia River uses the .125 bolt face don't they?

[454bore]

I think I read something a while back that precision firearms might make some 6mmAR barrels if there was enough interest.

[Huckleberry75]

Columbia River uses the .125 bolt face don't they?

From the looks of their web site, yes.

[Huckleberry75]

I spoke to Mark last week about a 6mm AR barrel (but not about a group buy), and he was very insightful and helpful. I left the conversation feeling much better informed about the 6mmAR, overall. He mentioned that he felt it a tremendously underrated cartridge and gave it a solid "thumbs up" on performance.

[PrecisionFirearms]

I will totally be interested in supporting this group buy. I already have the reamers in place. Are you folks thinking Button Rifled and more affordable or the best deal on a Bartlien Cut Rifled Barrel?

Mark Hostetter
Precision Firearms
Samurai Firearms

[PrecisionFirearms]

As for twist rate 1-8 for everything up to and including 100 grain. 105 should have 7.5. Over stabilization isn't so much of a problem except you can loose some velocity due to faster twist. Jacket separation is something that is very rare especially with the medium velocity of this cartridge. if you want a argument about twist rates and all that go google 224 Valkyrie LOL!