According to the bullet makers, the damaged tips do not effect the accuracy much. However what you are seeing can not be ignored. Most of the damage happens when the shells in the magazine come forward on recoil and hit the front of the clip. A rough feed ramp could cause some trouble. A gunsmith should be able to polish that for you. The simple answer if the tips are causing the problem would be to switch to the ballistic tips. I have had four Remington pumps and have not had any problem with that.