I live in Ohio so I dont have to shoot copper. But my 870 shoots 2 inch groupes at 100 yards with the rem copper solid. And they only drop 2 inches between 50 and 100 yards out of my gun. So at 100 yards I dont have to hold over. IMO the performance is better than any lead bullet I have ever shot. In accuracy, bullet drop and hard hitting. I have not tried the Barnes slugs or the XP3 so I cant compare them. But after 26 years of hunting deer with a slug gun I am impressed with the copper solid out of my gun.