Early Browning A-5's in 16ga indeed had 2 9/16" chambers. I do not know the date they switched. Converting one to 2 3/4 normally involves more than just a re-chambering. Ejection port usually has to be opened in the front & I don't rcall what else is needed to make them function properly.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra