I bought the leupold zero point few months back in anticipation of mounting a couple scopes. Well, needless to say,that baby is probably going to be up on Ebay anyday now. It was a frustrating experience to say the least. Granted, im no Einstien but have mounted and zeroed a few scopes in my day and this gadget didnt live up to expectations. I followed thier not to clear instructions on the bench with both rifles, got out to the range and couldnt hit paper at 100 yards ( a REAL big piece of paper)..moved the targets up to 50 yards, still not on paper (i asked myself ***??) finally removed the bolt (like previous poster said) and by eyeballing it realized both guns were shooting close to 6 feet low, keep in mind , this is after i supposidly "zeroed" both guns using this contraption, following instructions or so i thought. So, after about 20 rounds of ammo, i got both guns on paper and zeroed accordingly. Kinda defeated the purpose of buying this boresighter. Im not sure where i was going wrong, the reviews on this unit have been pretty decent or pretty bad depending on whose you read, but one things for sure, im not using it again.