Military Guns and Ammunition

Hosted by gatnerd

This is intended for people interested in the subject of military guns and their ammunition, with emphasis on automatic weapons.

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True Velocity .308 Weight and Teardown pics    Ammunition <20mm

Started 15-Aug by gatnerd; 1512 views.

From: gatnerd


EmericD said:

According to the reloading tables found on Warner Tools website, the 88 gr could reach 3400 fps from a 26" barrel with the 6 mm CM case. The Powley computer predicts something like 3340 fps at 52 kpsi from this same barrel length, and still 3060 fps from a 16" barrel with 2480 J of ME and a cartridge specific energy of ~180 J/g (not bad given the 16" length). With a .258 G7 BC and a bullet length of >31 mm, that would make an interesting AP round

Thank you for running the numbers; I was very curious how that would perform from a 16". 

As far as 'nearly off the shelf' cartridges go, I think the TVx6mmCxFlatline has a lot of potential - I think it would be a pretty fantastic LMG round for the new FN EVOLVYS. 

In terms of lead free VLD's, I recall you mentioning some work on bringing back pressed/swaged/ cold formed brass projectiles? Did that ever come to fruition?

I'm curious whether something like the Flatline could be produced cheaply and at scale for military applications. 


From: QuintusO


6.5 grams lighter in the case isn't light enough for you?

I got mine in today as well.

In reply toRe: msg 8

From: gatnerd


Well seems like TV cases are out in the wild now, and so we're starting to see some good testing on Youtube.

Heres a super test of Heat Transfer using FLIR. The polymer case does indeed result in a cooler weapon then brass.

True Velocity .308 Winchester Keeps Chamber Cold?! | Thermal Images

True Velocity's polymer ammunition is known for keeping temperatures down compared to brass ammo. The composite casing insulates the heat from the powder, ke...

And some basic accuracy testing:

True Velocity vs. Federal Gold Medal Match, Sierra Matchking, more | Virtus

True Velocity claims their polymer-cased, Nozzler Custom Competition .308 Winchester can stand toe-to-toe with the best match-grade factory ammunition around...

And from another test by those guys using the same Desert Tech bullpup boltgun:


From: smg762


If heat loss is the goal, could one use an open bolt gun and somehow solve the drawbacks of the open bolt design

For instance the gun jerks with each shot, but is there a way to solve this?

Such as delayed blowback and a lighter bolt


From: Farmplinker


A well designed API (Advanced Primer Ignition) gun is very controllable in full auto, but it only works for pistol cartridges.