Did not get to the range today but the mini-14 was designed to handle both rounds so 5.56 or .223 should not matter unless the scope rail changed something which I doubt.

The gun was stripped and cleaned by the smitty so cleanliness shouldn't be a problem either.

Am I correct in understanding that the 5.56 in loaded for higher presures? Does that equate to velocity? I just can't believe that military ammo is hotter than say a good quality Remington .223 round.

I'm willing to bet the problem remains but will know for sure when I can get to the range. Who would have thought...