Hi, I’ve had the exact same results with a Ruger ranch rifle. PPU shoots rubbish. Barnaul shoots 100m around 1.5-2” groups. I found out why. PPU projectile was a tad over .308 diameter. Barnaul .310”. PPU is only good for gathering brass (in my gun)
I’m going to develop a sub load using 180 grain boat tails (.310”) not .308.
I’m going to use AR2207 start at 14grains. Work down to 12 and then 10 and finally 8grains. Hopefully I can borrow a crony and stop when 1000-1100 FPS. I’m thinking that 10 grains will do it. But afraid of getting a stuck projectile. Better to start high and work down.
Cheers
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