Originally Posted by Fischer
Rifle only cartridges. .35 - .375 are medium bore, .40 & up are big bore. Power or capability don't factor in, we're looking at bore diameter.


That would take in a lot of revolver caliber lever actions chambered for 41 Mag through 500 S&W. Which is fine by me, I'm just asking where the fences are.

Last edited by SargeMO; 10/30/17.
Direct Impingement is the Fart Joke of military rifle operating systems. ⓒ