The 10mm Auto is a powerful semi-automatic handgun cartridge favored for defensive carry, tactical applications, and medium game hunting. This article contains published 10mm reloading data for various bullet weights and popular pistol powders to help you develop an optimal load. Keep in mind that exact data depends heavily on specific components, seating depth, primer type, and the original publishing source.
10mm Reloading Data
| Cartridge | Bullet Weight (Grs.) | Powder | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 10mm Auto | 155 | Titegroup | 5.8 | 6.5 | 1,250 |
| 10mm Auto | 155 | Blue Dot | 10.5 | 11.8 | 1,350 |
| 10mm Auto | 165 | Power Pistol | 7.5 | 8.5 | 1,250 |
| 10mm Auto | 180 | Longshot | 8.2 | 9.3 | 1,287 |
| 10mm Auto | 180 | Accurate No. 9 | 12.0 | 13.5 | 1,250 |
| 10mm Auto | 180 | Blue Dot | 9.5 | 10.7 | 1,220 |
| 10mm Auto | 200 | Longshot | 7.0 | 8.2 | 1,172 |
| 10mm Auto | 200 | Accurate No. 9 | 10.5 | 11.8 | 1,150 |
Explanation Of The Data
The supplied 10mm reloading data covers the most popular bullet weights for the caliber, ranging from light 155 grain defense projectiles to heavy 200 grain penetrators. The table illustrates how powder selection and charge requirements must be adjusted based on the weight of the bullet being fired.
155 to 165 Grain Bullets
Lighter 155 grain and 165 grain bullets are typically loaded for maximum velocity and rapid expansion in self defense scenarios. For a 155 grain bullet, a fast burning powder like Titegroup requires only 5.8 to 6.5 grains to push velocities near 1,250 fps. Slower, bulkier powders like Blue Dot require a much heavier charge of 10.5 to 11.8 grains to safely achieve 1,350 fps.
180 Grain Bullets
The 180 grain bullet is the industry standard for the 10mm Auto, offering an excellent balance of speed and penetration. Hodgdon Longshot is highly regarded for this weight, requiring a starting load of 8.2 grains and reaching a maximum of 9.3 grains for a top velocity of 1,287 fps. Accurate No. 9, a slower burning magnum pistol powder, requires a heavier charge of 12.0 to 13.5 grains to hit similar velocities safely without spiking chamber pressure.
200 Grain Bullets
When loading heavy 200 grain bullets for hunting or wilderness defense, powder charges must be noticeably reduced to keep internal pressures safe within the straight wall case. Using Longshot with a 200 grain bullet drops the starting charge to 7.0 grains and caps the maximum load at 8.2 grains, resulting in a maximum velocity of 1,172 fps. Slower powders remain the safest choice for heavy 10mm loads.
Understanding 10mm Load Data
A starting load is the absolute minimum powder charge recommended by ballisticians to safely ignite the powder column and reliably cycle the pistol slide. The maximum published load is the highest tested powder charge that remains within the established SAAMI pressure limit of 37,500 psi. Velocity measures the speed of the bullet at the muzzle in feet per second (fps). The 10mm Auto has a maximum overall cartridge length (COL) of 1.260 inches, and seating bullets deeper than published specifications will drastically increase chamber pressure. Always match your exact bullet profile to the published data.
Manufacturer Data vs Provided Data
The provided table is built on authoritative published data from sources like Hodgdon, Accurate Powders, and Sierra Bullets. The 180 grain Longshot data specifically mirrors Hodgdon’s maximum verified charge of 9.3 grains, which is widely recognized as a benchmark for full power 10mm Auto performance. Minor variations will occur if you cross reference this 10mm load data chart with other sources due to different test barrels, primer brands (standard versus magnum large pistol primers), and the exact bearing surface of the bullet used in the laboratory.
10mm Safety
Reloading data is component specific. You must never substitute bullet profiles, primer brands, or brass manufacturers without consulting verified published data. The 10mm Auto operates at high pressures, and minor changes can cause dangerous pressure spikes or catastrophic case failures, colloquially known as a “Glock smile” if the chamber is unsupported. Starting and maximum loads must not be confused; always start at the minimum listed charge and work up slowly. Always follow published manufacturer data exactly as printed.
FAQs
What is 10mm reloading data?
It is the tested and published specifications for handloading the 10mm Auto cartridge, providing safe minimum and maximum powder charges along with expected velocities.
What is the best 10mm powder for reloading?
Popular and effective powders for the 10mm Auto include Hodgdon Longshot, Accurate No. 9, Alliant Blue Dot, and Power Pistol.
What bullet weights are common in 10mm load data?
Published 10mm reload data typically covers bullets ranging from 135 grains up to 220 grains, with 180 grains being the most popular standard.
What primer does the 10mm Auto use?
The 10mm Auto uses large pistol primers, though some specific high pressure loads may recommend large pistol magnum primers depending on the powder used.
Where can I find a 10mm load data chart?
You can find reliable 10mm load data by cartridge in printed reloading manuals from Hornady, Nosler, and Sierra, or online at the Hodgdon Reloading Data Center.
Does Hodgdon publish 10mm load data?
Yes, Hodgdon publishes extensive data for the 10mm Auto, including specialized loads for their Longshot and Titegroup powders.
Why is cartridge overall length important in 10mm reloading?
Because the 10mm is a high pressure, small capacity straight wall case, seating a bullet too deeply will rapidly decrease internal volume and create a dangerous spike in chamber pressure.