Have one w-18" bbl, wood stocks. Pretty gun, got it as new from a local shop. I gave it (and my shoulder) a serious workout today with slugs, both lighter loads and 3" magnums. I'm a pistol enthusiast and am kind of green about shotgun makes, models etc. Is the 1200 series Winchester considered a tank like the Rem 870 or did I push it with the magnums today. Was fun though, I have a nice bruise to prove it...
You might find the reduced recoil rounds more to your liking. I found some 00 Buck loads the other day that are regular velocity, but 6 instead of 9 pellets. On the slugs I like the 1 oz or less slugs at standard velocity.
I don't have to deal with rampaging brown bears in these parts, so I leave the 3" mag slugs for those folks that need them.