I have a 3" BPS I use for deer and turkey,I had a Mossberg 3 1/2 ultra mag.I got rid of the 3 1/2 and went back to the 3" BPS.
the mossberg was the worst piece of junk gun I ever owned.
the 3 1/2 is not much more than the 3" to me. it may make a little difference if you are after goose.

just my 2 cents,there are 98 more.

I am not a hunter I am a whitetail population reduction specialest

remember keep your back to the sun, your knife sharp, and your powder dry.