I have an 870 super mag sp turkey 21 in barrel with indian creek .665. I shoot mag blend 5-6-7. the gun is 4yr old, when I first started with heavi shot #6 I was getting 130 at 40yd with 3in shell. second yr deep cleaned and went to blend count went up. Last yr #4 after 3 deep cleanings I am up to 221 at 40 in 10in circle, so be sure to deep clean barrel. I have a tru-glo gobble stopper with no complaints. The tru-glo red dot that came on gun lasted 1 season would not take the pounding. Tru glow replaced it with difference in price of the scopes. The gobble stop has preformed well the last 3 yr. no complaints. I just shoot 3in shells my old bones cant handel 3.5. hope the info helps.