I use the 280g WFN GC from montanabulletworks @1275fps with AA#5, in both G2 and Encore 12"ers. Recoil is 12ft.lbs. compared to 18ft.lbs for those federals. Makes for a much more enjoyable shoot. One ragged hole accuracy at 50yds with open sights. If you could slow it down to 1150-1200fps you would have an excellent combo for 150yds, recoil would be like a hot 357 shooting 180's, ie: less than 10ft.lbs., noise would like a 22mag in comparison also. If you get some I would recommend .432" dia.
I think titegroup, unique, and universal will give you uniformity at those slightly slower speeds, never tried though as the AA#5 @1275 was "good enough" for me.