Berger 150gr 300yds 56.0gr H4831

I bumped it up two grains to test pressure and accuracy. Group was decent, second four shot group was strung vertical 2 1/4". I came home and put some more sand in the rear bag to stiffen it up.

Even the second group is under MOA so I guess I should be okay with these loads. Shooting clover leaf groups at 300+ may not be in my personal capability and I should stop trying to get the gun to do so. For a Ruger No 1 and a Weaver classic V scope it's doing well.