I'm just trying to get a baseline on my rifles at 100 yards before extending them. At this point all 4 M39's shooting Russian Match ammo will outshoot my K31 with GP-11 or any commercial ammo I've tried (Hornaday SST, A-MAX, and BTSP, and PPU). I shoot from a bench with a scope to take the shooter out of the equation when testing rifles. The M39's generally shoot 1-1.5MOA with the match ammo and the K31 will shoot 1.5-2MOA but usually I get a flyer in a 5-shot group.
I was wondering how my K31 compares to other K31's in general to see if my rifle needs some work or not.