Why do we refer to 22 as 22 rimfire; is there such a thing as 22 center fire?
Why do some people call "tuna", "tunafish"? Is there some kind of tuna that is not fish?
But actually, there is (or was) a .22 WCF, as well as .22 -R Lovell, .22 Ack Hornet, .22 BR Rem, .22 CCM, .22 CHeetah MKI, .22 CHeetah MKII, .22 Flea, .22 Harvey Kay-Chuk, .22 Hornet, .22 ICL Gopher, .22 Jet Imp. Ackley, .22 K-Hornet, .22 KSS, .22 Krag Short, .22 Lindahl Chucker, .22 Mashburn Bee, .22 Maximum Lovell, .22 Maynard Extra Long, .22 Newton, .22 Nieder Mag, .22 PPC USA, .22 Picra, .22 Rem. Jet Mag., .22 Savage, .22 Savage Imp. Ackl., .22 Spitfire, .22 Waldog, .22 Wampus Kitty, .22 Wasp (303), .22 Win. Mag. and probably more.