Just curious about this ammo?


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ms6852
January 1, 2012, 08:34 PM
The XM193F 5.56 cartridge labeled with the words "visible iris". I am not sure but believe it has to do with the annealing process. Does this mean the ammo is reloaded or is it new, or is to to make it reloadable again?

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tyeo098
January 1, 2012, 09:15 PM
Pictures?

Jeff F
January 1, 2012, 09:52 PM
visible iris just means that you can see where the case was annealed. Most military ammo is not polished after loading. Heres a link.
http://le.atk.com/pdf/XM193.pdf

Most all of that L.C. XM ammo is either over run (not likely) or eject or reject for some reason, its not bad ammo, its just that particular lot of ammo did not meet Mil Spec for some reason.

firemanstrickland
January 2, 2012, 12:50 AM
To be perfectly honest, I am not sure about the visible iris but, this is exclusively the ammo I use in my rifle Armalite carbine. I have put approx. 7000 rounds down range and have had absolutely no problems, my rifle loves the stuff and so do I

ms6852
January 2, 2012, 01:57 AM
visible iris just means that you can see where the case was annealed. Most military ammo is not polished after loading. Heres a link.
http://le.atk.com/pdf/XM193.pdf

Most all of that L.C. XM ammo is either over run (not likely) or eject or reject for some reason, its not bad ammo, its just that particular lot of ammo did not meet Mil Spec for some reason.
Thanks for the link, was just wondering why it would be annealed if brand new.

firesky101
January 2, 2012, 02:02 AM
from what I understand annealing is part of the mil-spec requirements for 5.56.

Tim the student
January 2, 2012, 02:17 AM
Thanks for the link, was just wondering why it would be annealed if brand new.

Part of the manufacturing process. Its pretty hard on the brass, so it needs to be softened up before it can be completed.

-v-
January 2, 2012, 03:40 AM
Also, correct me if I am wrong, but I dont think the DOD is buying much (any?) M193 stuff, and mostly going with M855, and other non-M193 stuff. Being a type of ammo they don't purchase any more, all Federal 55gr FMJ would be XM193 for that reason.

Jeff F
January 2, 2012, 08:59 PM
Also, correct me if I am wrong, but I dont think the DOD is buying much (any?) M193 stuff, and mostly going with M855, and other non-M193 stuff. Being a type of ammo they don't purchase any more, all Federal 55gr FMJ would be XM193 for that reason.

Its still listed as being produced
http://www.atk.com/capabilities_defense/cs_as_ma_sc_5.56mm.asp

rcmodel
January 2, 2012, 09:08 PM
All brass is annealed once or more during the manufacturing process.

Commercial ammo is usually polished bright & shiny afterward.

Military and dangerous game ammo isn't.
http://www.ammo-sale.com/proddetail.asp?prod=55817

rc

NOLAEMT
January 2, 2012, 09:28 PM
Is there a reason that military and dangerous game ammo isn't polished?

Jeff F
January 3, 2012, 12:33 PM
Is there a reason that military and dangerous game ammo isn't polished?

I don't know about dangerous game ammo but I think the military does not really care what their ammo looks like as long as it works and that polishing is another step that would increase the price of said ammo.

rcmodel
January 3, 2012, 12:57 PM
Like Jeff F said, it is cheaper & and that is one thing the military goes for.

It is also positive proof that annealing was actually done properly in the final stage, and both the military & many dangerous game hunters want positive proof of that.

Without it being done, the case necks will eventually split and the bullets will fall out before they get around to shooting them.

rc

medalguy
January 3, 2012, 01:02 PM
Jeff hit it. The extra step would add to the cost and it's not required.

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