I did post it on an earlier thread, but i used it on my barrels this year. If you check the IBS records page you will see the results with the light gun. The light gun i shot in heavy, i shot it in the aggs. at Harry Jones and it was first in the 10 match group agg., first in 6 match group agg., and first in 6 match score agg. If you you guys don't do it or at least try it's your call but it sure makes things easier for me if you don't. If you decide to try it call Hobie at Kelbly's and he will get you going in the right direction…….. jim