One thing to keep in mind...the Winchester and Remington both use single extractors while the Mossberg uses a dual setup. This is far superior in the fact that if you have over expansion in the chamber, the extractor will not slip. Also the Mossberg uses and elevator system instead of a ramp system for the action. I find it more reliable on faster pumps. I have a 870 7shot as well but my Mossberg is my go to gun.
I have these shots in my gun in this order...first shot is blank usually, second is number 6 bird shot, third is 4 buck, fifth is 000 buck, sixth is 000 buck, and last resort for o-shit moments is 3 inch slug. That is in my 870 though. Usually got my Mossberg similar but it is only 5 shot.
I have these shots in my gun in this order...first shot is blank usually, second is number 6 bird shot, third is 4 buck, fifth is 000 buck, sixth is 000 buck, and last resort for o-shit moments is 3 inch slug. That is in my 870 though. Usually got my Mossberg similar but it is only 5 shot.