I have a Tisas M45, stainless with the 4", or 4.25"... whichever it is, that I've been playing with lately. I replaced the slide stop lever, the ambi saftey lever, and put a stainless Wilson extended mag release button on it.
I've been playing with some cast boolits, some LLA'd and some powder coated (bought commercially). I have a couple of molds coming, and wanted to know what to size my boolits at, so I attempted to slug the barrel today. I've done this before on other pistols, with good success, but I didn't have any pure lead slugs to push down the barrel. I used one of my cast boolits, after squeezing it a little to bump up the diameter, got it to about .465 or so.
After running it through the bore, I mic'd it, using two different mic's, and came up with .449 for the groove diameter. The slug looked like it had filled out the bore pretty well.... I actually had to briskly tap it into the bore from the chamber end with a wood dowel to get it started.
Does this bore diameter seem crazy to anyone else but me? It's not the end of the world, because I can size to .452, or even .451 if I want to. I just thought that most acp barrels were more like .451 or so.
The slug I used was cast from adulterated WW metal. It's softer than "pure" WW metal... scratches with my thumbnail fairly easily. I do have some pure lead somewhere out in the storage area that I could use to cast a slug with, but it seems that my harder slug filled out the bore pretty well.
Any thoughts or experiences will be greatly appreciated....