I haven't shot the 45-70 but I did the .450 Marlin which is basically the same thing. They shoot really accurate in my gun. At 100 yards we were getting 1" groups with a couple touching. I haven't shot anything with them yet but the dead tree we use to hold the target up sure shakes when they hit. We can shoot it with a 30-06 and it will never move but when you shoot it with the .450 you can tell when it hits. They should be great for hogs which is what I bought mine for.