I don't know on this one I have an old bushnell collimator that works ok at the very best...but a couple of times it put the rifle off the paper at 100 yards(probably operator error) but nevertheless I like SOARKREBEL's idea and was the only way I could get the ones that went off the paper back on the paper unless a convenient spotter was available. If your stuck on the collimator get the Leupold magnetic and being that the barrel is SS should make no difference since you have plenty of iron in there that rusts anyway. I have heard horror stories about the laser sighters.