What Is +P Ammo? (+P and +P+ Explained)

March 14, 2026 · AmmoBin.com

You'll see '+P' on some defensive ammo boxes. It signals higher pressure — and more velocity — but it's not for every gun. Here's what it means.

What +P means

+P ("plus pressure") ammo is loaded to a higher chamber pressure than standard SAAMI spec, producing more velocity and energy. +P+ is even hotter and is not a formally standardized rating, so treat it cautiously.

Is it safe in your gun?

Only fire +P in a firearm rated for it — check the manual or manufacturer. +P increases recoil and wear; +P+ should only be used if the maker explicitly approves it. When unsure, stick to standard-pressure ammo.

When it's worth it

+P can give defensive loads a modest performance edge, common in 9mm and .38 Special. For practice, standard-pressure FMJ is cheaper and softer-shooting — see FMJ vs JHP.

Frequently asked questions

Is +P ammo safe to shoot?

Only in firearms rated for +P — check your manual. It produces more pressure, velocity, recoil, and wear. +P+ is non-standard and should only be used with the maker's explicit approval.

Is +P worth it for self-defense?

It offers a modest velocity/energy edge in defensive loads. It's worth it if your gun is rated for it and you can still shoot it accurately.

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