Gave my GAP .300 win Mag to a buddy to sight in for me with a new scope. He brought it back with a live round stuck in the tube and had tried to get it out but broke a cleaning rod trying. Took the rifle to a machinist friend who is a shooter and he tried a steel rod to tap the round out, was successful in pushing the bullet into the case but could not get it out. He did fill the case with oil to ruin the powder. I have sent the gun to a smith but my question is what do you guys think caused the round to get stuck in the first place? The rounds were custom loaded at a reputable custom round making company.