I forgot these guys for classic 16gauge ammo. It's good ammo, and they have the line made for shooting in an A-5.
http://www.rstshells.com/This is where I buy my 2-1/2" 16ga. ammo.
Me too, I had a short-chambered Model 12 a few years ago and got a case of 2 1/2" #5 shot from RST. They seem fine, they leave a little more residue in the barrel than I am used to but no harm done.
