Try Jtree Gymnastics Balm, I'm bulk ordering some for my gymnasts and making a rip care kit for them. Link Removed
It's always best to make sure your hands are taken care of before they rip. Calluses are GOOD but you have to make sure they don't get too big, that's when you rip hardcore. Get a good pumice stone and everyday in the shower rub your calluses down, but not too much. You want your skin tough so you can take the swinging & friction. Tough skin is good skin, just like a tough body & tough mind!