Shortly before WW-II our North American ammunition companies began offering their 28-gauge skeet loads in a 2 3/4 inch case. Very soon after WW-II the 2 1/2 and 2 7/8 inch 28-gauge shells were gone and all loads were put up in a 2 3/4 inch case.
That's what I find in my 1940 Shooter's Bible. Remington Kleanbore Nitro Express was 2 7/8" (but still only 3/4 oz shot). Kleanbore was 2 1/2", 5/8 oz. Shur Shot Skeet Load was 2 3/4", 3/4 oz.
I remember spotting an H&R 28ga single shot at a gun show. Pretty high price. Asked the dealer whether maybe it was 2 7/8" chamber. Said he'd never heard of such a thing. I pulled out my chamber gauge and measured it: 2 7/8".
Last edited by L. Brown; 09/28/18 06:47 AM.