9mm vs. .38spl+p for Self-Defense!?!..Do Ballistics Matter in Handguns?

Published on March 23, 2026
Duration: 8:21

The Yankee Marshal, an experienced firearms instructor, discusses the ballistics of 9mm versus .38 Special +P for self-defense. While terminal ballistics can be comparable, especially with high-end loads, 9mm semi-automatic pistols offer a significant capacity advantage (16-31 rounds) over .38 Special revolvers (5-8 rounds), making 9mm the practical choice for most self-defense scenarios.

Quick Summary

For self-defense, 9mm Luger generally offers a superior advantage over .38 Special +P primarily due to ammunition capacity. While high-end loads for both calibers exhibit comparable terminal ballistics (energy levels up to ~485 ft-lbs), 9mm semi-automatic pistols typically hold 16-31 rounds, vastly exceeding the 5-8 rounds found in .38 Special revolvers. This higher capacity is crucial in defensive encounters.

Chapters

  1. 00:009mm vs. .38 Special +P Comparison
  2. 00:31.38 Special +P vs. .357 Magnum
  3. 01:55Why Ballistics Matter in Self-Defense
  4. 03:10Comparative Energy Levels
  5. 05:09The Capacity Advantage

Frequently Asked Questions

What is the main difference between 9mm and .38 Special +P for self-defense?

The primary difference for self-defense lies in ammunition capacity. 9mm semi-automatic pistols typically hold 16-31 rounds, while .38 Special revolvers hold 5-8 rounds. While terminal ballistics can be comparable, the higher capacity of 9mm offers a significant advantage.

Do ballistics matter in handgun self-defense?

Yes, ballistics matter. Factors like mass, velocity, and energy determine a projectile's terminal performance. While hitting the target is paramount, if both parties connect, the effectiveness of the round becomes critical in a self-defense encounter.

Can .38 Special +P match 9mm ballistics?

High-end .38 Special +P loads can achieve energy levels comparable to high-end 9mm loads, sometimes reaching up to 485 ft-lbs. However, low-end 9mm loads start around 300 ft-lbs, while high-end 9mm can reach approximately 465 ft-lbs, showing significant overlap.

Which handgun caliber is better for self-defense, 9mm or .38 Special +P?

For most self-defense situations, 9mm is generally considered superior due to its significantly higher ammunition capacity in semi-automatic pistols compared to .38 Special revolvers. This advantage often outweighs minor differences in terminal ballistics between comparable loads.

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