If the gun has sufficient metal around the chamber there is no reason not to shoot 2 3/4” ammo in it as it is without changing anything. But if you’re uncomfortable with that send the gun out and have the forcing cones lengthened to 1” or 1 1/2”. Accomplishes almost the same thing as chamber lengthening without removing as much metal in a critical area. Not sure about the English proof law but not relevant on this side of ocean.


When an old man dies a library burns to the ground. (Old African proverb)