I was confused about this very question for a long time, and I finally did the research to find out the truth. I think a lot of people don't know.

Oh, and I have the same problem with my wife, too!

Mike

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...

I was all ready to jump on this until I read down where driftrider had already said it better than I ever could.

Glad to see that your still lurking around her Neil.

I tyvm!

It's my understanding that the chamber pressure is higher because they use a faster burning powder. There are several reasons for this, one is to get as much velocity as possible out of a short barrel M4. They also worry about muzzle flash, any unburnt powder will create a much larger flash. The muzzle flash not only gives away your position to the enemy, but it also blinds the shooter when making a nightime assault while wearing night vision goggles.

If I am understanding correctly.....it would be better to buy a 5.56 to safely shoot either round???

I am in the market for my first AR and I want to make the most of my purchase.

^^ Correct.
-Jake