Problem with carbine loads
My M1 carbine functions perfectly with factory ammo. I have shot LC, Aquila, and Prvi Partizan without any problems at all and they produce acceptable groups with the sights set for 100 yards. However, with my hand loads I have to set the sights at 200 yards to get on the bulls eye and I also have frequent failures to feed. Here is how I prepare the reloads. I clean the cases in a tumbler, then full length resize them, expand them, then trim each case to 1.280." I use a charge of 15.0 grains of WW296 and check the charge on a scale at regular intervals. None of the cases have been fired more than 3 times. What am I doing wrong? Any help will be much appreciated.
Clarification for my post
Here is what I meant by "failure to feed." The case fires, but not with enough force to cycle the action. I have to cycle the operating slide by hand to extract and eject the case and feed the next round. This happens about 10% of the time. I hope this clears up this point.