That looks like a good one

by FOG, Thursday, March 28, 2013, 22:17 (4203 days ago) @ Glen

I was thinking some more about my 25-2 experience, and I remembered that gun had very sharp shoulders at the ends of the chambers (virtually 90°), I suppose to promote headspacing on the case mouth.

I didn't notice that so much on the 1917, but the 1955 would shave thin slices off fully-seated bullets. (The 25-2 would even do this with hardball.)

This occurred because the cartridges sort of sagged downward when using a full-moon clip, or they sat more or less parallel in the bottom of the chamber without one. Upon firing and exiting the chamber, the bullet had to literally scrape past that sharp edge to get to the barrel.

I believe that was why the 25-2 shot better with the bullets seated out a little ways. Doing so prevented this shaving problem from occurring.

The idea, of course, isn't much different from a Keith bullet ('true up the bullet in the chamber').

Matter of fact, that's where I got it.

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