I had a 10fp in .223 for 5 years, mine was the same way. I took it to a gunsmith and he tried adjusting the feed lips, never helped. Learned to live with it till I couldn't stand it anymore then finally sold it.
The rifle could shoot 1/4" groups all day and was a nice rifle, but I never did like the fact that out of 10 rounds usually 1 or 2 would not enter the chamber.
Probably not the answer you wanted but get used to it.