Mounted a scope via drilling and tapping the reciever on an old Winchester 1300 for a Remington 7400 base. Bought a pile of bases and rings when a local sporting goods store went out of business. I also ordered a bunch of cheap Brenneke looking slugs USA brand. They are a low recoil version, 1400 fps for a one ounce slug. Thought they might be good for getting the scope close and then fine tune with better slugs. Nope the difference in impact is 2.5 feet! And they leaded the barrel as if designed to do so. However got that one sighted in dead on at 75 yards with Winchester full power 1 ounce slugs. The area we plan to hunt first this year is rifled slugs only for feral hogs and archery for deer. However I wasn't finished. My rifled barrel for one of my Remington 870's iron sights are dead on for the Hornady Monoflex saboted lead free bullet and I am not touching those sights till I have used all of them. But I have several barrels, one has been cut to 22 inches and has a big orange bead on it. Figured I would try to see where it hit with factory Remington sluggers. Luck was crawling all over me! First two shots at 25 yards are just two inches high and centered. Back off to 50 yards and also 2 inches high a couple inches apart. Back off to 75 yards and take a shot at an empty gallon milk jug and center it. This with the big bead sitting even with the top of the receiver in the middle of the little flat and using the top of the bead to sight in with. I have never ever had this happen with a bead sighted shotgun. But not complaining unless you count all the other shotguns this was a big fail on. Five shots and just a little leading, 3 shots of a Remington 1 1/8 oz load of 7 1/2"s and the barrel is spotless! On a roll now.