Am on a Northwest site reading some of the issues those folk are facing out there! I was given the permission to reproduce the following, think the message is spot on!! Has to do with fighting the British many years ago!!
If we compare these events of the past to today's struggles we have to...
Looks like the bolt is not unlocking fast enough to expel the carbon from the fired round, the buildup if any should be a carbon deposit just behind the gas rings on the bolt. The bolt should move freely in and out carrier with some resistance. Should not take extreme effort to move it!!
Check...
Have had a Lyman 55 for 35 yrs-----have 2 Dillon 550's load only ball and short stick powders in them--get the Lyman out for all long stick powders, best measure for them!!!