M3 Grease Gun Chamber

Need help with a home build I'm working on. Wondering if anyone has an M3 GG barrel that they can drop a live round into and take a closeup picture of how much of the round protrudes from the chamber. I was able to get a copy of the Springfield Armory Barrel Assembly print# C153435 dated June 5, 1943 through another form. The copy isn't the greatest and it's difficult to read. A clear copy of the print would be a big help also if anyone has a copy. Thanks for looking.