Just bought a boresighter

[Rick65Cat]

Just picked up one of those magnetic boresighters by Bushnell. I was all worried about how hi or low to set the thing on the end of the barrel. Then I discover it doesn`t matter how hi up or down you slide this thing....The grid never moves!
How the he!! does that work??

[Hotshot]

It's magic! I have the Leupold version and it works great on all but one rifle. I've used it on at least 15 with only the one problem barrel.

[Rick65Cat]

Well there has to be some logical explanation. Theres nothing in the instructions on "how" it works. Does the same thing up and down and side to side.

[skipper]

I've never used one of those things. I allways just pull the bolt out and sight down the bore. The range I go to will bore sight my other rifles, the ones that I can't just pull the bolt out of, for free.