I have a 9mm XDM that is slugging at .357. I was wondering what I should be using for a jacketed bullet diameter or the range of diameters that I could use before having trouble.
Quote:
Push a well oiled soft lead bullet or soft sinker thru the barrel and measure.
I usually just tap it about an inch into the throat end, then tap it back out.
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I'm confused. Do you run the slug thru or just partially and back it out. Or do you do both and measure? I ran my slug all the way through then measured.
I also have a .45 ACP 1911 that slugs right at .450. I've had trouble seating the ammunition to the recommended COAL and have it chamber. I was using .451 185gr XTP bullets and they seem to hit the lands and stick (so it's a plunk fail). I set the bullet back further and tried them with a low charge and it seemed to work fine. I'm wondering if I end up getting a heavier grain bullet that is longer how am I going to seat it without seating to far in and having higher pressures.