.451 vs .452

[Unclenick]

Lugerstew,

It should apply to both. With conventional rifling it is a little more obvious where the different diameters are. A typical 45 Auto bore slug looks like this:

 

[lugerstew]

Thanks Unclenick, yes pictures make things much more understandable, I always figured it was measured differently, again thanks, I will try to remember to post when I shoot the .452 powder coated, vs what ive been doing with .451 copper plated. So great to have expertise available when you need it.