.223 vs 5.56 NATO

[Ron37388]

Went to the range today and ran 150 rounds of the WPA 5.56 NATO thru my MP15. First time I had fired it. It ate everything with no problems what so ever. I do need to get used to firing the weapon and the sights. Groups were a little off. The bolt assembly and other parts were what I would call "clean" compared to what my 9mm and .45 Auto look like after less rounds. So far I think I'll stick with the WPA ammo. It's cheep and seems to function very well.

[Injunbro]

Never mess w/ a system that's working right. Most new autos need to go through a couple of hundred rounds to settle in. It sounds like you're well on your way w/ a great little rifle.

[azmick]

With the first few hundred rounds out of my AR, I ran it wet. Very wet. It slung oil like an old HD.
Seemed to work for mine

[Ron37388]

I put 150 rounds of WPA .223 thru it yesterday with no problems. After cleaning, I think it was cleaner than my 9mm or .45 Auto's. Seems like it's good ammo. Had a few good groupings, but still not used to the gun. Thanks for all the good info.

[USAMP]

ARs will run dirty, if they are wet. Dry and dirty causes more issues on the range and "down range"....just my experience....I have an M4 (not AR) and I can shoot 5.56 and .223, NATO rounds are loaded to the full SAAMI specs so they go bang when a soldier pulls the trigger. Nor sure about .223....