Been thinking about this rifle and thinking maybe should try 165 partitions as well.. Looks like BSA has a good baseline with powder and that is IMR 4350 not a big fan of it cause it meters bad but if that's what works I will stick with it no need reinventing the wheel on this. in the past few years I have grown to like the Barnes TSX as well might try the 165's as well.Or start stocking up on 180gr hornady spfb bullets. So many choices here.