@CarnageRush
Your issue may come from Mixxing your 5.56 ammo
Mixing Brass & Steel ammo in 5.56 is a bad idea, no matter which platform you run.
5.56 is straight walled, which can cause performance issues based on the chamber more so than the tapered chamber & cases of the 7.62x39 & 5.45x39.
If you have to shoot both types of ammo, Highly recommend you shoot the Brass FIRST, then shoot the steel.
Brass Cased ammo has a softer brass case that expands more at the case mouth to seal the chamber much better than steel cased ammo. Better sealing of the case mouth (and thus the chamber) keeps the chamber clearer of fouling debris. Because the chamber is kept cleaner, brass cased ammo tends to run smoothy.
Steel cased ammo expands less at the case mouth, which allows much more fouling debris into the chamber (dirty & rough). Steel ammo cases doesn't expand much (harder and smoother), so that fouling doesn't affect steel cased as much.
If you shoot steel ammo (getting chamber dirty and rough) and then shoot brass ammo the brass will expand more and grip the dirty chamber and often causes performance issues.
If you shoot brass, you should be great.
If you shoot steel you should be great
If you shoot BRASS FIRST, THEN STEEL you should be great
If you shoot STEEL FIRST, THEN BRASS you may have problems...
Try this out and I'd bet you will see a big difference in performance...
BIGGER_HAMMER
P.S. - Tula is about the lowest rung of 5.56 ammo. Dirty as Hell + being low powered = plenty of opportunity for fail! If you shoot steel cased 5.56, I'd recommend Wolf or Monarch Vs. Tula.