Quote:
Originally Posted by Brian Dudley
To my knowledge, there never was a 2-5/8" shell. True 2.5" long chambers in this time period was an English thing.
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The 2 5/8" 12ga was the standard before the 2 3/4" shell was made available. I have seen boxes of old 2 5/8" factory ammo for sale in the used/junk bin at the Kittery Trading Post. If my memory serves me the Winchester M97 was the first gun designed to specifically shoot 2 3/4" 12ga ammo, which had higher pressures than the 2 5/8" shell. Maybe Dave Noreen can fill in some of the details here.