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Articles proclaiming this and that are abundant, but I can't see 5.56 being dumped any time soon for general issue. At least not till a good polymer-cased round is selected?? Metal-cased ammo has pretty much run its course and is at an evolutionary dead end. For all the whining done about the 5.56, all of the advantages that encouraged its adoption in the first place still apply and Big Army still knows that. So do its downsides of course.
Since the acquisition rules changes some years ago, various .mil organizations will continue to pick and choose what they like and run with them, with civilian projects glomming on to proclaim "adoption by the military" to help market their product.
Another huge consideration/advantage of the polymer case is weight being carried by the individual soldier..huge difference in weight between the two..metal vs polymer..
http://www.gunsandammo.com/editorial/true-velocitys-new-polymer-cased-ammunition/247607
Ripp that is, to my limited knowledge of caseless ammo, one of the main reasons for going to it. That is along with saving raw materials (brass) and the weight & volume for transport.
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