Ladies, do any of you work at hand or upper body strength to shoot bettter? If so, what do you do? I shot 60 rounds the other day at the range and my hand hurt!!! my arms were not sore, but they were tired. I have signed up for a class coming up in a couple weeks and they say to bring 400 rounds of ammo to it. I am wondering if I am strong enough. I need to get to the gym! (for many reasons, but this is one) Any grip strengthening things I could do at home?