Quote:
Originally Posted by B.L.E.
My 1860 Army has a groove to groove diameter of more than .457. I know it's more than .457 because if I drive a .457 round ball into the barrel and then try to look though the barrel, there's seven points of daylight showing past the ball.
Are you sure you are not miking from land to land instead of groove to groove.
In the muzzle loading days, a rifle's "caliber" was the diameter of the barrel while it was still a smoothbore, before the rifling grooves were cut. That's why the cap and ball revolvers were called .44's and not .45's.
Ruger uses the exact same barrel that they use for their .45 Colt revolvers for their ".44" caliber Ruger Old Army revolvers.
The bullets are supposed to be a swage fit in the barrel, otherwise rifling doesn't engrave in the bullet and you have excessive blow by.
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No, I'm not sure about my measurement at all. I find the caliper hard to use, and it's a cheap caliper I got off ebay.