i shoot a257roberts ai.stiler action/walther target hunter barrel.24".
The rifle shoots.25inch at 100yds and 1.25'@300 but when i push it
out to 400 the groupes open up to 4inchs.
I shoot 117gr sst @3050fts velocity spread of 7to12fts.
could it be possibe i need a bullet with higher bc to inprove group,
or is possibly shooter errror.
have got a leupold vxl 4x14x56 on rifle.would be grateful for any one"s thoughts.