I had a guy tell me this on another forum about 20ga turkey guns...
"This sounds all well and good, but there is a reason more people do not use a 20 gauge and that is not because of pellet count but because of penatration. With the larger gauges their is more powder giving a better penatrating load. also, you are asking for everything to be perfect with a twenty gauge, most times you do not have a gobbler standing still waiting for the shot but the bird is moving. In the right situation a 20 gauge will kill a bird dead just as quick as a 12 but that is if everything is perfect.?"
I have always thought a pellet leaving the muzzle at 1100 fps, no matter if it is a 20ga or 10ga, will still hit the same (if it's the same pellet). If a 10ga load leaves the barrel at 1200fps and a 12ga load leaves at 1200 fps they both will hit the same. The only thing you are gaining is # of shot. Is this true or am I wrong?