+P on My Ammo Means... What?

Published on August 6, 2025
Duration: 1:46

This guide explains the meaning of '+P' on ammunition, emphasizing that it denotes higher pressure loads due to increased powder content. It stresses the critical importance of verifying firearm compatibility with +P rounds to prevent catastrophic failure and injury. The information also touches on performance trade-offs and considerations for short-barreled firearms.

Quick Summary

'+P' on ammunition indicates higher pressure loads due to increased powder, typically 10% above standard SAAMI specs. Crucially, firearms must be rated for +P to prevent catastrophic failure. Short barrels may not gain significant velocity from +P rounds due to incomplete powder burn.

Chapters

  1. 00:00Introduction to +P Ammunition
  2. 00:08Defining +P Pressure
  3. 00:19Safety and Firearm Ratings
  4. 00:32Performance Trade-offs
  5. 01:06Barrel Length Considerations

Frequently Asked Questions

What does '+P' mean on ammunition?

'+P' on ammunition signifies higher pressure loads. These cartridges contain more powder, resulting in approximately 10% greater pressure than standard SAAMI specifications for that caliber, offering increased power.

Is it safe to use +P ammunition in any firearm?

No, it is critical to ensure your firearm is specifically rated for +P ammunition. Using higher-pressure rounds in an unrated firearm can cause catastrophic failure, leading to firearm destruction and potential injury.

Do short-barreled firearms benefit from +P ammunition?

Often, short-barreled firearms may not fully benefit from +P ammunition. The powder may not have enough time to burn completely, resulting in wasted energy and minimal velocity gains compared to standard loads.

What are the risks of using +P ammunition incorrectly?

The primary risk is catastrophic firearm failure. Using +P rounds in a firearm not designed to handle the increased pressure can lead to the gun exploding, causing severe damage to the firearm and serious injury to the shooter.

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