Home Forums Hunting & Shooting Muzzleloaders Input requested - help me tighten my groups

I've got an Encore with a Bergara barrel that I got from Bellm. Also have oversize hinge pin and a spring/trigger kit

I am shooting BH209, 100 grains by volume, CCI Magnum 209 primer, and 300 grain Hornady SST in their sabots

I am getting consistent 3" groups.

Scope is a Leupold 6x42.

Any thoughts on how to tighten up the groups? It's more accurate than my old iron sighted Renegade but I'd like to get a little more out of it

I can and will start varying my powder charge up and down but any advice or pointers would be appreciated. (Up or down? 5 grain increments or 10? Other thoughts on bullets or primers?)

Thanks