One of my next builds is going to be a 6.5 X 284. I already have most of the reloading equipment, powder, primers and doing all the gunsmithing work on my lathe, mill. Going to set it up for "F" class. I shoot with the owner of Master Piece Arms so I know what great barrels they make - MPA/Spencer. I will probably have them make me a 30" with straight 1.25" barrel. It is a "Button Pulled" process and quality is second to none with everything MPA makes. I have been in the shop, watched most of the processes and feel confident that I will get a Tack Driver. My question to all out there that shoot 6.5 X 284s is on the barrel twist. I will be shooting 142 SMK & 150 SMK maybe up to 155gr on top of H4350, Lapua brass, BR2 primers. I know that there has been great success and records set using 142 SMK H4350 in a 1:8 twist. Has anyone experimented with 1:7.75 or 1:7.5 twists in a 6.5 X 284?
