Re: 308 win 155 Sierra , is 3000 fps possible?
I was able to squeeze 2999->3005 FPS out of my 30" with 47gr Varget, Nosler Brass, 155gr Berger Hybrids, and GM210M primers.
RADcustom - if you use a powder drop, you should be able to get at least 47-47.5 of Varget without crushing