My brother has a 300 win mag in Browning Boss. He was shooting it for the first time to day. Factory ammo cycled great. His reloads wouldn't feed. ONe in the mag one in the chamber would feed. Two or three in the mag one in the chamber the last one/two would jam. Anybody ever heard of this. Obviously there could be something wrong with the handloads, but these were loaded rather carefully and crimped with the lee crimp die, powder charges all trickled individually, seated carefully one at a time. Just wondering if there was anything up with these guns that someone might have heard of causing this to happen. This is the MKII Safari grade.