Didn't take long to realize chamber to small. Used a suggestion from this forum to correct. Seated a cast bullet 5/16 deeper than the neck. Didn't fill the case with lead, which may be better. Ground the rim off and drilled the flash hole out to except a screw. Used 240 grit on nose of case. Turned it in the chamber with a screwdriver and drill. Kept expanding the 5/16 inch and replacing the grit till case chambered all the way in the chamber. Took an hour or more. I've shot .377, .378 and 379 bullets since. .379 most accurate. Bullet is a Lee 250 gr. Going to try a .380 when ever I get one honed out. On a fired 38/55 case neck measures .396. A blown out 30/30 the neck measures .398. A 375 case fired in a 375 measures .401. Result from expanding chamber is no more sticking cases, no more bulge and a round chambers easily. By the way the last .379 load fired a 3/4 inch 3 shot group at a 100 yds. Next time I go to the range I'll find out if that was just luck. ben1025