Quote:
Originally Posted by padredan
easy bore gauge i know of would be to take a 9mm round or the projectile and place it down the muzzel, goes in , it's a 9mm , doesn't it's not.
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The 9 mm round's tip goes
most of the way in; you'll still see some of the bullet between the end of the muzzle and the end of the shell--maybe 1/16"-1/8"--because, with a land to land to land measurement of ~8.82~ there would be .08 mm difference to keep it from sliding in. It would be necessary to pound on it to have the bullet
totally submerged in the bbl. When trying the 7.65 bbl., it will be quite obvious that the diameters aren't even close because the very tip of the bullet is all that will go in.
The pencil test, maybe better by using the eraser end. But if you're stuck with a shop pencil without an eraser, the 9mm will allow it to drop to the bottom
easily and still allow for some rattle/play. The pencil's shaft does go into the 7.65 bbl, but you'd really have to push to get it to the chamber, and there is no play in this snug fit.