XXL Reloading
Speer 125gr Jacketed HP reloading bullet

.357 | 125gr | Speer JHP

Our reloading data for the .357 | 125gr | Speer JHP bullet covers a total of 15 suitable calibers and 618 load recipes

The Speer Jacketed Hollow Point (JHP) bullet is engineered for reliable expansion and penetration, making it a versatile choice for self-defense, law enforcement, and hunting. Constructed with a hollow point design, this bullet offers controlled expansion upon impact, maximizing energy transfer while maintaining the structural integrity needed for deep penetration. The jacketed construction enhances performance by preventing barrel leading and ensures consistent performance in various conditions. Typical applications include hunting medium-sized game such as deer and feral hogs, as well as self-defense scenarios where terminal performance is critical. Its expansion characteristics allow it to open rapidly while maintaining sufficient weight retention to achieve desired penetration depths, typically optimal for both hunting and defensive contexts. Suitable calibers range from popular handgun cartridges like 9mm and .45 ACP to rifle variants, which benefit from this bullet’s balanced terminal performance. For handloaders, the Speer JHP offers predictable behavior in terms of seating and crimping, ensuring ease of loading and repeatable accuracy in both semi-automatic and revolver platforms. Its broad flexibility across different firearms and loading configurations meets the precise standards demanded by seasoned reloaders and hunters alike.

About this bullet

.357 | 125gr | Speer JHP is a bullet made by Speer. At 125 gr (8.1 g) and a diameter of 0.357'' (9.07 mm) it suits handloads where bullet weight and barrel length have to be matched carefully. Its G1 ballistic coefficient of 0.129 drives velocity retention and wind drift downrange — higher values mean a flatter trajectory at distance. We currently list 618 load recipes across 15 calibers for this bullet.

Most popular calibers for this bullet

CaliberLoad recipes
.357 Mag.78
.357 Maximum76
.357 SIG74
9 x 25 Dillon67
.38 Super Auto66

Load data for .357 | 125gr | Speer JHP bullet is available in the following calibers:

Safety notes

All load data is reference data only. Always start at the minimum charge and work up in small steps while watching for pressure signs. Never exceed the maximum charge published by the powder or bullet manufacturer.