9mm +p ?

[jmorris]

If you have a good hollowpoint and a subcompact you might need + p for full expansion

Pressure pushing the bullet out of the barrel isn’t going to effect that. As above there are examples of lower (non +p) pressure rounds offering more velocity.

 

[AJC1]

View attachment 979231 If you want Fast !

Is there no core in that cup???

 

[fxvr5]

He also likes +p, after doing some research here and other places it seems the only garentee is higher pressure and lower safety, couldn't I just use a faster burning powder like red dot, and still stay within the min/max tolerance. I guess I do not understand the why behind +p in a non comp setting.

Presumable he wants high speed since he's asking for +P. A mid- to slow powder will generally produce higher speed than a fast burning powder for the same pressure. Thus a fast powder like Red Dot will give high pressure but not much speed compared to a slower powder. Check your load manuals and select a powder that gives the higher speed. Accurate #7 and Vit 3N37 are good candidates for this purpose. (See the article I linked to.)

 

[LightninST]

Is there no core in that cup???

https://libertyammo.com/product/civil-defense-9mm/

Lead free, copper monolithic, nickel plated projectiles.

Nickel plated brass cases.

Our Civil Defense 9mm projectiles function differently than any other self-defense round on the market. We designed the Civil Defense line to eliminate threats with one round. We did this by creating the maximum amount of damage and tissue disruption possible. They do well against barriers, but when the large cavity fills with fluid, the hydraulic pressure builds until the side walls of the projectile explode. With that explosion comes rifle sized temporary cavities and hydrostatic shock, therefore increasing stopping power by tenfold. Following the explosion, the bullet fragments into a starburst shaped pattern creating multiple wound channels.

This process also benefits in many other areas across the spectrum of things considered when talking about self-defense. Such as reduced over penetration and lessening the risk of unintended casualties. Having a lighter projectile also leads to less muzzle flip for faster follow up shots.

 

[jmorris]

Is there no core in that cup???

Back in the mid ‘80’s PMC had a round based on the Ring Airfoil Projectile concept They were first brass but the ATF decided they were AP pistol rounds so they switched to some alloy of copper. They called them Ultramag 38 spl were 66 gn, 44 spl were 110gn. Had a gas check/wad of sorts to push it out of the barrel.



Guilford Engineering Associates (GEA), also used the Abe Flateau design to make the steel AP “cyclone” bullets.


Guess what’s old is new again.

 

[Australian410hunter]

So far as I know, no gun manufacturer is OK with using +P+ ammunition, specifically because there's no SAAMI or CIP standards and thus no defined upper pressure limit.

The Ruger Security 9 manual states:
"No 9mm ammunition manufactured in
accordance with NATO, U.S., SAAMI, or CIP standards is known to be beyond the
design limits or known not to function in this pistol."

So +P is OK according to Ruger.

Handloads, not so much...

I understood military +P+ SMG ammo still fitted the NATO description?

 

[NMexJim]

I understood military +P+ SMG ammo still fitted the NATO description?

American Rifleman | M1152 & M1153: The Army’s New 9 mm Luger Loads

Army's New Service Pistol Getting Rave Reviews at the Range | Military.com

 

[Bcwitt]

If you do not have a strain gauge or similar, you have no way to be sure what your rounds pressure actually is. Tables are just someone else's test result. Useful info, but not an exact repeatable science. I do not know any experienced handload that goes that route. Workup as per protocol. Always.