I have the Optima and just sighted it in this weekend. I shot with Blackhorn 209 at 80 grains, Triple 7 ff at 80,90,and 100 grains. And I shot 295 powerbelts and 270 grain Harvestor sabertooths. All of my shots stayed within 1.5" at 50 yrds off a fence post and even some thrown in freehand. I couldn't believe how well it shot considering the powder changes and bullet changes.
I can only imagine on a bench, with a good rest, perfecting the load/bullet, and some patience...........I believe I could widdle it down a lot !