One of the biggest, if not the biggest problems that murders your grip faster than anything else is rushing or cheating your backswing. Not allowing the Bell to finish it's natural pendulum causes a whole host of problems. The main one is grip, timing this wrong can
make a 24kg kettlebell feel like a 40kg bell.
It pays to learn how to relax and just "Let" the bell finish it's backwards motion. Yanking too early will also cause you to mis-time the leg extention which leads to more totally avoidable difficulties...
Notice how your weight shifts during the backswing from the balls of your feet to the heels, then the bell starts to move forward, your body weight shifts back onto the balls of your feet. Wait until you feel this last shift forward to apply force.. This will put you in the optimal position to efficiently get the bell where you want it to go UP.. Not Out!