Bore-Sighting Tools//What Works?

[sgphoto]

As I replace some iron open sights with optics (eyes getting older) I'm considering getting some type of bore sighting device.

What's good? I'd like for it to be adaptable to a variety of rifles from .22 to 45-70.

Less concerned about extreme precision as getting it on the paper so as to fine tune at the range.

Any suggestions?

Steve

 

[MountainBear]

I've used the Bushnell system and had good luck with it. I've had others use the Leopold system on my rifles and they got me on paper. I don't think either system are bank busters...