Well, if it's happening with these, but not factory ammo, the problem is your reloaded rounds. Does not matter that it doesn't happen in your AR. Your AR uses a 5.56 chamber. The 110 is a 223 chamber.

Excessive headspace, underpressure loads, loose primer pockets or not being fully seated from the start known causes. Perhaps the shoulders are bumped back too much...perhaps they are cut too short....or THAT SPECIFIC CHAMBER in your 110. If I had your rifle and the cases, I could narrow down the exact "WHY". If you are reloading you should be able to as well.