Three Letter Re: Cartridge Reloading Dollars and Cents
James, Having just read the letters regarding reloading economics, I noticed the following caveats and had two important points about them: 1. “do not shoot lead bullets in a Glock” because of the polygonal rifling. Polygonal rifling essentially creates rifling engagement angles that are less than 90 degrees, therefore whatever bullet material you use seals the bore better (because it’s easier to deform lead/copper into a rifling groove that has a more obtuse (open) angle) than a sharp 90 degree angle. A standard cartridge fired out of a conventionally rifled barrel will travel faster out of a polygonal rifled …