There’s quite a bit going on.
Yes, the chamber is made for 2.75”. If you place a longer shell in, you are essentially jamming it in. It won’t open at the pressure is should..and you will generate more pressure. Hence the punch I’m the shoulder.
Some makers over bore to make a better pattern or use forcing cones to string the shot before it hits the Choke.
If seen certain brands recoil harder that others on tight chokes
, ie turkey or full.
Join a shotgun club that shoots skeet, trap and sporting clays.. you’ll love it.
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