Don't get me wrong.
It's just that some people reading here..........may just assume things, based solely on the thickness issue.
Note: Federal's Standard Sm Rifle primers measure .019" in thickness and they work with .223 Rem. pressures. YMMV, due to other issues.
Remington 6 1/2 primers measure .020" in thickness and they do not recommended it with .223 Rem. re-loads.
But, Good or Bad......it's the ARFCOM way.
PS............I suspect that you'll be fine with Magtech SR primers..........but, that is solely based on the lack of "very vocal" complaints.
Then, you may get the people that say to use ONLY Magnum
SR primers with ammo meant for use in a rifle with a floating firing pin (such as the AR15).
That's also the ARFCOM way.