Thread: What could cause this?

Originally Posted by JBNZ

Thanks mate, appreciate that. This is the method I used: I checked a shops work with this method against. Gunsmiths work and and I thought the shop job was out slightly but gunsmiths was good. I could be wrong though.

Pointed the rifle away from a concrete wall in the garage. End of stock butt was about 3m away from the wall. Ensured the rifle was level with a high quality spirit level. Hung a plumb Bob from the ceiling so it was just sitting off said wall and in line with rifle.
Next I turned the lights off grabbed a strong little torch and pointed it down the muzzle end of the scope. Cross hairs lit up on the wall and adjusted the scope and rifle till it was spotty dick with the plum Bob.

Not sure if I read that method on here but I feel it works.
Thoughts?
*Had to turn the magnification up or down for the cross hairs to become sharp on the wal.

@JBNZ I've learnt something new from this blog today, thanks. Getting my scopes dead plumb is something I really struggling with. I'm going to try "The Concrete Wall Method," which I had never heard of.... I also struggle with getting the rifle plumb in the vice (plywood packers), what part of the rifle do you put the spirit level on especially if the receiver is round with no flat surfaces? Is the iron rear sight (removed) dovetail accurately level? Alternatively, is the din rail accurately level? I know a couple of my scopes are not perfectly setup and it is irritating!