Feedback please...Mid Range AR build and Load

[CaptBeach]

I set out to build a 600 yard hammer. YHM Upper and Lower, M16 BCG with a WOA fitted bolt head to a WOA 16" heavy SDM barrel, 1:7 Wylde chamber, UBR stock, YHM Diamond Free Float rail, Geisselle SSA trigger, Wolfe springs, Burris Extreme rings and a SWFA 3x15. YHM QD Flash Suppressor and YHM 308 Suppressor (sometimes). So far it functions flawlessly but accuracy with the surplus mil M855 and M193 is crap 1.5 to 2.5", sometimes 3-4" at 100 (I can get .3-.4 with my 308 bolt gun with 308 175 FGMM clones, I'm a former 2111 Armorer, Marine Rifle Team shooter, DM contractor so I believe its not the shooter) I expected better than this and I suspect its too fast of a twist. I happened on a good deal with 500 77 gr SMK's and want to work up a load for it...I have BC2, RL15, and Varget on the shelf. I have a virtually unlimited supply of 1x LC brass. I have read that 24gr of RL 15 or Varget is the ticket for Service Rifles with this weight bullet and this twist but with 20-24" barrels. What issues will I have other than velocity drop running the 16" WOA?

Thanks

 

[TBeghtol]

Your current accuracy with 855 and 193 are right in line with what I see from my White Oak 20 inch Service Rifle barrel.

However, with 24 grains of RL15 and a 77 grain bullet, I routinely get 1/2 minute groups.

Try some quality handloads and I think you will be very happy. I bet you will still get 2600 2650 fps even from the 16 in barrel.

Tim Beghtol

 

[CaptBeach]

Thanks for replying...I hope so...I've been reloading 308/45/9/06/300WM for a long time...556/223 not so much...learing curve like the others I guess...glad to hear the .mil numbers are about right...HOW can the .gov give our guys that kind of ammo? When I was in the Corp I could take issue ball and shoot nearly MOA all day long, with irons at the base, pistol range had a 100 yd BR set up.

So no issues with the LC brass either?