Had a cheap red dot (BSA) so I said wonder if it would work on my H&R 45/70 so mounted it and went to the range. Worked for three shots and the insides are scrambled, took it off and used the scope rail to shoot with. lined the front sight (Lyman Globe) up with the bottom of the rrail amazing shot the 10 ring a little below the X ring 10 shots all within 1.25" at fifty yds. at least didn't waste a trip to the range. I also went to try a couple of other rifles that I was told that wouldn't shoot military primers because they were too hard, wrong they both shot fine one a 308 and the other a 30-06. I have a bunch of '06 ammo loaded for my Garand and didn't want to load anymore right now and the 308 was Australian an it not only shoot it was accurate as well.