RE: Experience with semi-automatic slug guns?
I have a Rem. 1100 with a hastings rifled slug barrel on it. I put a B-square (or is it A-square) scope mount on the reciever. You replace two pins in the reciever with two bolts. I put a 2.5 power bushnell scope on it.
I found when I tightened the scope monts too much on the reciever the gun would not cycle properly and became a single shot. If I lossened the bolts the mount would move slightly up and down and so would the groups. I took it to my fav. gunsmith and he put some barrel beding epoxy between the B-square mount and the reciever and tightened the bolts. When it set up he loosened them a touch and it works fine now.
I shoot Federal sabot slugs and get 2 3/4 inch groups at 100 yards.
Robin
P.S. Slug gun accuracy is about hitting a deer or something similar in the chest at 100 yards or so. A 5 or 6 or 7 inch group would be ok for this. I don' t know of anyone who uses a slug gun for woodchucks at extended ranges or coyotes accross the pasture.