I only have one complaint with my Mossberg 500. It was chambered for 2 3/4" and 3". (1960's)
After firing 75 - 3" through it, it was noticeably looser in the action. I quit using 3" in it at all.
It always was a tight shooter. I had to wait, and wait, and let my target get out there, then knock it down. It was stamped Full Choke, but was more like an Extra Full.
I always picked the furthest duck, or waited for the Jack Rabbit to get out a ways.