I recently discovered that my Remington Sendero 300 win mag (which was shooting about 1/3 MOA with handloads) had suffered damage to the rifling at the crown. Needless to say the accuracy went in the dumps. I sent the barreled action away to PGW Defence Technologies in Winnipeg, Manitoba to have it cut and crowned. When I received the rifle back they had cut approximately 3/4" off the end and cut a recessed muzzle crown with no bevel and lapped the bore. I set it back into the stock and tried it out. I wasn't expecting the handloads to group the same as they did but I didn't think that they would be shooting about 1 MOA . I tried a couple different loads a half grain up and down of the old load the only one that showed promise was the half grain up load. Should I keep trying to tweek the loads or should I try something else, I'm worried that if I keep going up in powder charge I'm going to get overpressure. I guaged the wear on the barrel to be about .003". The load I was using was 68.0 gr IMR 4350, 200 gr sierra BTSP seated .02" off the lands, winchester cases, 215M primers. Hunting season is here and I don't have a load that I can confidently shoot into the vitals of an animal over 400 yards. Anybody got any tips?