ctw, if there is a Cabelas near you they have 20 ga Gamebore shells in 65mm or 2 9/16". The shells run about $10.00 a box and you can get the RST's for a little cheaper.
Your gun might be equiped with a Miller One Trigger. The early style had the selector on the tang safety. Forward for the right barrel and rearward for the left barrel almost like the 3 position safety used on "elsies".
As far as the shooting of 2 3/4" shells in 2 1/2" chambers, there will always be a discusion on that. A lot do it but is it right. Hopefully those that do have a gun with a long forcing cones and not a short one to build up excessive pressure.
