MAC, do you know how NATO 120mm tank shells work?

yes, it's nitrocellulose with a baseplate

It's a semi-caseless polymer round with a metal abseplate.

I'm saying for small arms

It's the same difference, you're just caught up in scale.

different problems

I don't think the tech works that way

The only problem with nitro is IIRC water resistance

It melts like butter if you get it too wet

Which can be solved by using a thin layer of thermoset that's below the adiabatic flame temp of the propellant

read all three parts of this interview

https://www.thefirearmblog.com/blog/2017/03/11/interview-kori-phillips-program-officer-lsat-ctsas-part-1-program-history-ammunition-technical-discussion/

very interesting and enlightening

https://www.thefirearmblog.com/blog/2017/03/18/interview-kori-phillips-program-officer-lsat-ctsas-part-2-ammunition-technical-discussion-contd/

https://www.thefirearmblog.com/blog/2017/03/25/interview-kori-phillips-program-officer-lsat-ctsas-part-3-development-6-5mm-ct/

https://www.thefirearmblog.com/blog/2017/11/28/lsat-cased-telescoped-ammunition-problem-cookoff-brief-thougts-002-follow/

I'm surprised the military had enough braincells to look at telescoped rounds

logistically speaking it makes sense

weight reduction

but then they smoked crack and went with 6.8mm caseless

because reasons

@Magos Squid "The Life Raft" sorry to derail your whole conversation....

So what I'm reading is they went with a medical polymer that was fuckawesome, and easily coul dhave been *cheaper* than brass

6.8 Remington is used by the Czech in a variation of their 805A1 combat rifle

Easier to produce too, like, 11 less steps to make a bullet easier

It's not 6.8 caseless but it still a weird round

the jordanians use it as well

i think in LWRC rifles

The standard is 5.56 NATO, but there are 6.8 Rem variants in service

so strange though

6.8 SPC is so shit

the Serbs went with 6.5 Grendel as a DMR cartridge in some special DMR AK variant

since PPU was laready producing it

Well there are 3 versions of the gun itself so I'm not surprised they have such a weird round option.
There's the 805A1, 805A2 and then the 805 2

Fucking lmao, so brass heatsink is overstated, and poly cases are cool to the touch even after 300 rounds, but the primer cup is hotter than balls (and she learned that from personal experience)

The Czech are some crazy bastards, but they make good shit in all honesty

except for the CZ52 pistol and rifle...

Shhhhhhhh

Everyone has that one embarrassment

lol

What I'm reading here is that polymer caseless is cheaper, easier to make, just as reliable as brass, and still fulfills the much lighter weight requirements of the project.