Originally Posted by
cpaspr
Pardon my ignorance. I've read about slugging a barrel many times in the past, but have never done it till now. But - I'm not sure which numbers are important.
I have a new Ruger SR9c. Only 27 rounds through it, so far. All jacketed.
I drove a lubed .358 SWC bullet from chamber to muzzle. The barrel has six lands and six grooves. If I'm mic'ing it correctly, the diameters are .3485" where the lands cut in and .3570" where the bullet conformed to the grooves. Is that a correct interpretation?
So, what size mould do I need to be using once I start casting for 9mm? Or rather, what should I be sizing my bullets to for this gun?