Save the cash.Find a solid rest where the rifle won't move, look down the barrel(the non-killing end) and align it on an identifiable spot. Then look through the scope and adjust the crosshairs until they are on the same spot and you're GTG.I fire a round at 25yds and adjust the scope according to the hit then fire another. If things line up I go to 100yds fire three and adjust the scope. Three more to check....
But, but, but....That ain't high speed ,low drag
For what those laser bore sighters cost I'll just stick with my Bushnell bore sighter. JR you're more than welcome to come over and use it any time.I bought mine on eBay but you can get one here for $58 shipped. http://www.opticsplanet.net/bushnellboresighterbanner.html