308 Polymer Cased Ammunition In Production

[WLJ]

PCP .308 Polymer Cased Ammunition Finally In Production
http://www.thefirearmblog.com/blog/2013 ... roduction/

[Marcus]

What is the benefit to that?

[justang1997]

Huge weight savings. I remember back when you could buy polymer cased 223. Put that in a magpul mag and it was very light. Very noticeable.

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[Dave1965]

Huge weight savings. I remember back when you could buy polymer cased 223. Put that in a magpul mag and it was very light. Very noticeable.

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Why did they stop making it?

[KYgundude]

Non reloadable I assume?

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[justang1997]

I don't know why they stopped. It used to come in red white or blue cases and was on the cheap side. If I were to guess they probably had issues with either the round sliding down into the case or maybe a double feed being made worse by a round possibly bending or the case splitting. Something a TRB can't easily fix.
I think its interesting they came back out with the ammo in 308. The weight savings are probably greater and I'd say the pentagon wants to save weight on linked 308 for crew served weapons. Both soldier carried and vehicle carried. I remember our vehicles suspensions squatting like crazy after we loaded up the guns and ammo.

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[WLJ]

Huge weight savings. I remember back when you could buy polymer cased 223. Put that in a magpul mag and it was very light. Very noticeable.

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Why did they stop making it?

If I recall right, one of the biggest problems was heat build up in the chamber. No not the casing melting, but the fact that metal casings help carry away some of the chamber heat with them as they are ejected and polymer casings don't do as that readily and it's taken a while to work that out. Don't know for a fact if this was a factor or not but it's what I heard.

[scorpionmain]

I predict these will be caught up with the "undetectable guns" nonsense.

[WLJ]

I predict these will be caught up with the "undetectable guns" nonsense.

That popped into my mind as well.

[Rem700]

I predict these will be caught up with the "undetectable guns" nonsense.

Of course they will....dont you remember the commericals "Plastics make things possible" lol

[burn360]

I still have 3 boxes of the .223 I thought it was great

[WLJ]

More info and pictures

PCP Ammunition: Polymer Cased Ammo
http://www.gunsholstersandgear.com/2013 ... mmunition/

A selection from the article

Forras explained the science behind the polymer. When a cartridge is fired the brass casing expands slightly outward engaging the chamber and then releasing the bullet from the pressure that’s built up. According to Forras, brass casings often do not completely engage the chamber due to minor deficiencies in the casing or wear in the chamber. This causes the release of the bullet before or after maximum pressure is reached, which causes differences in velocity and ultimately accuracy.

The PCP polymer casings are designed to completely expand and engage the interior of the chamber to maximize the pressure of the cartridge during firing. The bullet leaves at the ideal pressure which increases velocity and accuracy.

Foras stated that PCP has conducted it’s own tests and discovered an increase of 65-75 fps consistently across all their different cartridge calibers.

[WLJ]

Review

Review: Polymer Cased Rifle Ammunition from PCP Ammo
http://www.luckygunner.com/lounge/pcp-ammo-review/

[Toddstang]

Seems like it would swell and shrink from hot to cold and cause jams being plastic.
And currently $2 a round!~!!!!!!

[Wyldman]

I bought two boxes of this stuff and will be testing it in my AR-10 as soon as the weather warms up ac little. They were $39.99/20 & PCP only allowed me to buy 2 boxes.

From the Wyldphone