.308 gas gun load question (Varget & 175smk)

[locolife]

Just built an AR10 with a Rock 5R 16" barrel and need to work up 175gr Varget load for it. I see from other posts that 44gr to 45gr seems to be a favorite.

My question is what do the semi's like? Jammed or a bit of jump? Any crimp to prevent movement during chambering?

Any other advice to speed up the load development process would be greatly appreciated.

 

[BCP]

Re: .308 gas gun load question (Varget & 175smk)

2.8 COAL 41.5 start 45 end 43gr in lc brass is my pet one no crimp not necessary

 

[2ndPanzer]

Re: .308 gas gun load question (Varget & 175smk)

45.0 in LC worked well in mine. 43.5 was another spot. As BCP said work it up from 41-42 orzo and see what it likes. No need to crimp. Load to mag length. And go.

 

[mrhog]

Re: .308 gas gun load question (Varget & 175smk)

44.6 of varget was my load at 2.80 OAL. But my SASS likes IMR4350 better. I use 44grs. and 2.85 OAL