I just bought a 12ga, 3 1/2" full choke, 22" barrel from the classifieds and this is my question. Is OK to shoot 3" & 2 3/4" shell in it? I really think it won't harm anything, but I want to check with ya'll before doing anything. This is my 1st H&R shotgun, so I'm not familiar with it. I shot it for the 1st time yesterday, using 3 1/2" 00 buckshot. At 30yds it had 17 out of 18 pellets in a 24" circle, with 9 within 12". Does that appear normal? Thanks, Paul