300BlkTalk

You may have to open up the gas port to get it to function properly, but I understand that is less troublesome than with even shorter barrels.

(Love the Cooper quote! Had not seen it before, but do love my HK P7s.)

I have a 16" Paladin bbl made from Douglas stock with his 3 way pistol position gas block. His tube is shorter and the barrel much, much longer after the port. Works beautifully w subs on the open setting and supers on the low gas flow setting. Has its own lower. Shoots subs to <1 MOA at 100 ya...

Found a longer vernier caliper and was able to get a better measurement of the exposed gas tube inside the upper of the 8.5" ... is 0.936". Compares to 0.950" for a different upper. So I don't think that's likely to be the problem. A rough measure of the gas port diameter is 0.096&quo...

Guys, Have begun to get an 8.5" 300 BLK upper running on an RR M16 lower. Barrel is a pistol gassed 1:7 CMMG Wasp 8.5". Is threaded 5/8x24 from the factory. Am using a YHM low profile steel gas block. Block appears to be properly centered over the gas port. I think I bought the pistol leng...

Excellent!!!!

Thank you ...

What is the diameter of the barrel at the place the gas block mounts?

Thanks!

I do understand that the machinist I use is very moderate in cost ... but his work is superb. i have 13x40 lathe with a 6 jaw set-true chuck. When I check his work with a Starrett "last word" dial gauge it has never more than quivered. Been thinkin' about it though ... and I really hate to...

My current load for the 220 gr SMK is 8.6 gr of current production 2400, old silver Winchester small rifle primers, OAL=2.190", LC brass. Load for the 225 gr Hornady OTM is 8.4 gr of current production 2400. Other specs the same. Each round is checked in a chambering gauge made with the reamer ...

Guys, I have a pistol gassed 16" with a three way switch block. I happen to like it as am able to run a variety of powders for both supersonic and subsonic applications. Has been very accurate with 2400 and 220 gr SMKs and 225 gr Hornady OTMs with <1" 100 yard groups and SDs less than 20 o...

Anyone use the CMMG 8.5" melonited, 1:7, pistol gassed 300 BLK bbl in an SBR for subsonic use?

http://www.midwayusa.com/product/798163 ... te-pre-ban

Thanks!