My gun comes with the screw adjustable buckhorn sight (which obscures a deer) and a primitive blade sight. I used a brass punch and exchanged sights. The primitive is way too lose so I put the buckhorn back. If I was to try to flare down the dovetail with a steel punch, would this possibly tighten it up? I had to order .498 round balls because Lyman suggest so, and I perform a dry ball test (with .018 patch) and a .490. The grooves did not make any impressions on the ball, just the lands. I measured it to be .502. The example in the book was for a .503 bore so I figured to go ahead and order the .498 balls. I have .018, .015, and .010 patches to experiment with but will start with the .018 because the diameter to the grooves is around .526. I ordered me another hunting pouch as well for $44. A suede one 8x8 with little extra pocket. $44. A suede one 8x8 with little extra pocket.