vulcan magazine pellets damaging

Hi Guys

I am an owner of 5.5 mm VULCAN rifle and recently i noticed that some pellets are damaged when i insert them into the magazine.
I already shared this problem with some friends who owned the same rifle and they stated that they are facing the same.
Did someone have this problem?
and is there any suggesions in order to solve it?
 
Thanks a lot for the informative posts.
However , i did not say that i damaged the pellets but the magazine tention is damaging them.

I believe that there is a little adjustments needed to the magazine spring to reduce the magazine tensioner pressure.

I am planning to do this in near future and i will keep you updated.

Thanks and I am waiting for other ideas.