Zrider, I'm sorry I didn't notice that she is already experienced with the 308 Winchester. With a 150 grain bullet and 2800 fps (roughly 40 grains smokeless powder) it would have the recoil of about 3/4 a 12 gauge shotgun (16 ft-lbs). So that gives you a reference of what she is already used to. That would be roughly 60 grains of 3f T7 with a 250 grain bullet. So you could start there because you know she is used to that amount of recoil.