Looking at an ammo sight that has Federal 5.56 62gr. Green tip (not for duty use)

What does the not for duty use mean??

It's "XM855" - not for use while active duty military because it hasn't gone through their official inspection process to make it designated M855

http://www.ar15.com/forums/t_3_16/534836_.html

Thank you for the response in your opinion should or shouldn't be a problem? /

 

Thanks alowerlevel after reading should shy away from.

 

Just bought a Sig a few months ago and Federal American XM193 nato was recommended what do you guys think.

It's "XM855" - not for use while active duty military because it hasn't gone through their official inspection process to make it designated M855

 

Good to know. I always thought it was m855 that didn't pass the inspection process because of dented cases or some other "defect" that didn't effect the ammo but caused it to fail.

According to Federal

 

 

The M885 is a mil-spec cartridge. The rounds marked "Not for Duty Use"

had ballistic variations that were outside of mil-spec.

 

Thanks,

 

Federal Ammunition

According to Federal

Basically what I was trying to say.

According to Federal

 

Military specs the ammunition by muzzle velocity, and accuracy out of a test rig. So the not for duty stuff is either slower or less accurate. The accuracy requirement boiled down is essentially 3moa for m193 and 4moa for m855. (both for 10 shot groups, 200 yards) The velocity requirement is 3,250fps +/-40fps form a 20" test fixture at 15ft form the muzzle for m193. 3025 +/- 40 for m855. Slop permitted in bullet weight is +/- 2gr.

 

Logic would say that NFD ammo either has out of spec bullets, is slower than the permitted MV, or is jsut less accurate than required for whatever reason. Although you could be out of spec for high velocity, I suspect that ammo is just pulled down to components rather than risk selling it as it is probably pretty high pressure and may cause issues in peoples' guns.