Once again no offence taken here. That rifle was taken out for the first time in a couple of years, the barrel was checked for obstruction. There has been less than 100 rounds fired out of it in its lifetime, it's still pretty tight to say the least, ie not broken in. It was dry as a bone also, yes I know any M1 gun needs lube. There was two failure to eject in 12 rounds. The load was 43.5 grains of varget behind a sierra 168 MK, I wouldn't call that a underload. The rifle just needs a good cleaning, lubing, and have the poop shot out of it. It should get better with age and some wear.
Ebner