Now if some civilian company decided to use it to name defective products that did not meet QAQC,, or product overruns (another explanation I have read) thats a different story. BUT I have used M118, back when it still was marked XM118. I can assure you, it was not defective and hit the intended target.
From MIDWAYS site
Yes Mil Spec ammo has crimped and sealed primers. And yes it fires after having been wet, sunk, muddy.Special Notes:
This ammunition has passed Full Military Specification Testing. It is the same ammunition that is being used by our military. This ammunition is NOT Military Specification Rejected Ammunition labeled "NOT FOR DUTY USE".
All XM ammunition shipped from Lake City is first run quality
To the OP...
We're talking 2 or 3 mags of ammo yes? I suppose I'd trade it out for new, and shoot it next time I was out at the range, just for peace of mind.. But truly.. unless it was underwater at pressure....Im 99.9999999% sure it is still serviceable.