So...I've only heard of 2-1/2 inch shotshells once. Somebody once said he used them as some sort of American close equivalent to an antique (turn of the century) British shell for a sxs "fowler" gun he had from that era.
My question is, and I think the answer is "yes" can these be fired in a 2-3/4" AND 3" chamber?
I have some vintage Winchesters that can't shoot steel and someone offered to sell me some non steel shells in 2-1/2 inches. I just want to be sure I can use them before I buy them. Seems to me this shouldn't be any different than firing 2-3/4 in a 3 or 3-1/2 chamber.