I think the Shiloh and Browning ones work pretty well for greasers. I don't own a Browning .40-65, but this spring I was beaten by a fellow using one in a schuetzen benchrest black powder match. IIRC he shot a perfect 200-13x and I shot a 199-14x. The fellow was definitely a better shooter than me, as I was shooting a breech seated .32-40 with a benchrest stock so I should have had the advantage.