When I shot BlackHorn 209 out of my Genesis, I shot the 250 grain Barnes Expanders. I used 90 grains of it. Accuracy was outstanding. I have no doubt in the quality of the bullet. I think a pass through on a whitetail would be almost guaranteed. I also shot some 250 grain Shockwaves with Blackhorn 209 and again, excellent accuracy.
I have never shot powerbelts out of my Genesis. Although I purchased two packs of them yesterday a Gander Mountain (on sale for $11.89 for the 348 grain copper jacket) and might try a couple.