My kids have shot 60, 70, 80 grains of BH209 with a 250gr bullet.
60gr should be good to approx 70yds (passthru shot on big doe at 40yds)
70gr approx 100yds (bullet found under hide on offside with 110yd shot)
80gr approx 130yds (passthru shot on smaller deer at 135yds)
The lightest load recoils like my 243
I would recommend a 250gr bullet like the Barnes TEZ with supplied sabot or a Harvester smooth black, this being the sabot of choice for us. This is the bullet recovered with the 70gr shot