Depends on how the guns are twisted. I am betting the Encore is pretty fast. Maybe try a Hornady Conical in the Encore. I dont know that a conical would be ideal recoil wise for a young lady.
If your H&R is twisted 1-48, 60 grains of 3F behind a PRB will knock down any deer at reasonable range. If she can take more, add more.
Twist is gonna run this game.
