"Ed Huntress" wrote:

These are close to the nominal groove diameters, so that doesn't explain the
discrepancy. The best explanation I've heard is that manufacturers often are
"creative" about naming calibers.

And creating yet another cartridge that serves no purpose other than increasing sales.

If the calibre hasn't been out for over 50 years, I'm not very interested.

Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller