Couple Of Quick Things ...
XM193 5.56 ammo. The X means that particular batch of ammo was not accepted by our US Government for government use. It does not particularly mean the ammo is bad. It does means that for any number of reasons, big, small, petty, whatever, that ammo was not accepted. I will not use the word rejected.
We also for years thought factory ammo was the best. We were wrong. Years ago we experienced problems with performance using factory ammo. Finally got to the point where we had to face our false assumptions that factory ammo could never cause concerns. It was. Overall case length was all over.
Our latest discovery was with factory .30 Carbine ammo. Under power. Again, over long cases. A bigger concern with the USGI M1 Carbine. A straight wall case. Ouch. Our solution to return to hand loading does not rest with fun or money saved, but for producing safe ammo. Higher precision. Yikes!
Hundreds of AR15 builds using fine factory ammo that wasn't.
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