Re how much a 6# gun kicks . . . You may (or may not) find that 7/8 oz loads in such a gun work just fine. But you can always shoot 3/4 oz loads in a 20ga, and unless there's something else going on with the gun (like bad stock dimensions), you shouldn't notice much kick. Shouldn't be any different than the 3/4 oz loads I shoot in my sub-6# 28ga, and I can shoot that gun all day.