Speedo66
Member
Do the cartridges fit the chambers of existing guns of the same caliber, or are new guns needed?
Heat seems an interesting characteristic to include in this discussion -- one of the many problems with the HK/Norma caseless selective fire project was much faster barrel heating without the ejected case removing some of the heat from the system.
Compared with metals, polymers tend to be insulators rather than conductors of heat. Someone has already stated that the use of polymer cases seems to reduce chamber temperatures. My question is: what is the thermal melting/failure point of the current generation of polymer cases? What happens if/when the barrel reaches these temperatures in machine gun applications? What is the high-temperature failure mode -- is the tendency to melt, swell, split, weaken etc.?
I don't really see polymer cased ammo supplanting brass cases in civilian applications
Wonder if I could shoot that out of my M1A and then sue them for false advertising for “Sub-Half Inch”. But they were smart. They didn’t specify. Because the 308 and 6.5 ARE Sub-Half Inch....diameter calibers.Sierra has partnered with True Velocity for this endeavor. True Velocity has stated that the cases can’t be reloaded.
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That is according to the claims of the article.Not trying to be snide, but what evidence supports your statement that polymer cases would be more consistent than brass?
reload 6000 rounds of wildcat match ammo every year and you might think there's a lot of room for improvement in brass casings. for every step, there's something annoying id love to eliminate: trimming, turning, annealing, futzing with primer pockets, donuts, fireforming, etc. and failures that could be less frequent, like split necks, head separation, loose primer pockets...
I'd be very concerned about users breathing the consumable case gases, especially shooting from machine guns.The metallic cartridge may go the way of the flint-lock... but it won't be because of a polymer cased round.
It will be from an ejectionless, enclosed bolt system consumable cased round.
Not really a today problem.
GR
Well, how nice is that for the companies making ammo?Sierra has partnered with True Velocity for this endeavor. True Velocity has stated that the cases can’t be reloaded.
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I'd be very concerned about users breathing the consumable case gases, especially shooting from machine guns.