I traded for my first 500, branded a "Revelation 310", it had the C-Lect choke. This was 1980 when steel shot got mandated. I used it in lieu of ruining my Spanish built double. But, a year later, put a 28" accu-choke vent ribbed barrel on it and used it up until 92. It was well broken in and the action was smooth. Sold it to buy a new 500 camo with polymer stocks as I duck hunt in harsh conditions.
These guns were my wing shooters, mostly dove, duck, and geese. I bought a Winchester 1400 gas gun that took over dove hunting duties, though, about 1989. I still own the 500 camo and it's still in great shape after 20 seasons. I recently found another Mossberg, a 535, at a pawn shop for $170 in GREAT shape and shot dove with it this year just to put some rounds through it. I didn't get to duck hunt this season, moving and in transition, but will next season. The blued and wood 535 will be my upland gun for hunting around here, Eagle Lake area. I need to pattern it with some 3.5" Ts, but I doubt it's going to take over from my 10 gauge on geese. I will still be usiing my old 500 camo on ducks in the salt marsh.
Life is good with MY Mossies.
They're tough and get the job done. At 60 years of age, now, I expect 'em to out-last me. I would not trade for a Wingmaster, had one40 years ago, hated it.