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Bullet/barrel ID is BS. They deform on impact. Hollowpoints really deform.
I remember a Dirty Harry movie where he digs a bullet out of a wooden post and then does a ballistic match. Yeah right.
Casings. You can tell the cartridge/caliber type, since it is marked on the bottom. It will not tell you what fired it, unless it is a fairly unique caliber.
Casing marking from the extractor on the out side/firing pin marks. This is a slight possibility, but 10 seconds with a file, and the marks will be different.
And finally, remember, revolvers don't leave casings behind, only automatics.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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