Agreed that you can often tune the accuracy of a particular bullet/barrel combination by varying the velocity. You can often get good accuracy out of barrels that have too slow a ROT and a bullet that is too long for that too slow ROT by pushing the bullet at, or close to, the maximum safe pressures. This method seems to work in 140 grain in 1 in 9" ROT .264" bores and 120 grain in 1 in 10" ROT .257" bores.
I've never had much success with the 125 grain Partition in any .264" bore rifle. I don't know why, but the 120 grain BTs and 129 grain Hornadys will all shoot better groups with less effort than anything that I've tried with the 125 grain Partition.
Jeff
