If one looks at the number of different center fire rifle loads just for .220 caliber bullets, you could easily come to the conclusion we shotgunners are lucky the chambers length of the cartridges we buy weren't broken out into 16ths of an inch.

I look at the 2" 12 gauge cartridge in the same light I look at the 3" 12 gauge cartridge. Somebody was trying to sell me something I really already owned.

Best,
Ted