Welcome to the forum. I hope this helps.I have three bolt action shotguns, and use two fo them regularly.
one mossberg 185k-a, a kessler model 30c, and a mossberg 185d. The mossbergs are 20s, and the 185d is my slug gun complete with a Lyman peep sight. Dead on at 75 yards and fairly lightweight. All three of them will put three in a paper pie plate at 50 yards with the old foster slugs, so please consider the old used bolts you see at gunshows. More modern? I'm kinda partial to my ex-girlfriend's savage 220.