As I remember, Browning did some tests back in the 1950s with 3" chambers and 2 3/4" ammo. They found they had marginally better patters with 2 3/4" ammo out of 3" chambers than they got out of 2 3/4" chambers, so they figured "why not 3?".
Hunt with Class and Classics
Religion: A founder of The Church of Spray and Pray
Acquit v. t. To render a judgment in a murder case in San Francisco... EQUAL, adj. As bad as something else. Ambrose Bierce “The Devil's Dictionary”
