Hello everyone!

I have a zastava pap m70 that refused to accept polymer mags such as pmags. Metal magazines worked fine but when pmags were inserted, the bolt carrier was hard to charge and would get stuck about an inch away from fully closing. Upon some investigation, I found that the bottom right of the bolt carrier, where the actual bolt sits, was rubbing on the top right of the magazine lip. I was able to dreamel down that part of the carrier so that it now just passes the mag lips and no longer gets stuck. My question is was this safe to do and will it damage the bolt carrrier over time? The metal is now sort of thin on that side. Not super thin but thinner than it was. Though the part dremmeled only holds the bolt and does not see much wear, I am afraid it might wear too much. Any thoughts?