When we pump the gun the new load may fall out of the bottom of the gun. Sometimes it will load but most of the time it will not. I bought the 410 for my son and did not realize this was a problem until we started shooting multiple rounds. He is only 7 so when he first got the gun I loaded one round at the time. After several months of practice I started loading multiple rounds for him to pump into the chamber and some will fall right out of the bottom. This happens with different ammo brands and different sizes. He was able to shoot his first deer last weekend with the gun and we are happy with the performance except for the chambering issues. Any help with this issue would be much appreciated.