I have shot my Genesis more then I care to think. And yes, I have had the cam get tough to open. But I found that by keeping some Q-tips in my shooting bag. When you shoot and it starts getting hard to open, take a Q-tip and soak it in your mouth, then with the primer out, wipe out the primer pocket. Also wipe off the inside face of the cam. This will help you open and close the cam much easier.