I was under the impression that to get the best from .223 Wylde that you needed to load special rounds specifically for that chamber. That factory ammo in a Wylde would give no real advantage.
My AR is supposed to have an AR Stoner upper in 5.56 from Midway. It was inexpnsive. Hell the AR was only $600. . . 50% cheaper than my .357 Henry.
I have shot 5.56 and .223 but don't have any comparisons where I shot both at the same time & I don't have any good feeling for the difference.
I had the same problems as mine with the Grendel. The sliding buttstock made a good cheekweld difficult. I hit the 7" target from 200yds with it, but no consistency.
With mine I'll put 2 within 1 MOA, then the 3rd flies off. My targets seem to always come out like this or worse:
View attachment 13039
View attachment 13040
View attachment 13041