I've got 2 rifles with buckhorns and can't shoot either worth a darn! I've already modified one to the "square post and slot" type, now the groups ain't half bad. The other is an italian sharpes and I'm gonna end up doing the same to it. I tried gettin' used to it again just the other day and found that there was just too much room for error (at least with me anyway). If I hold the bead right at the notch, it shoots too low and isn't adjustabe. So I hold it somewhere in the middle and can never get the same shot off twice. It may be good for close range target aquisition, but I've got a different gun for that sort of work. :wink: