.357 | 158gr | Speer JSP

About this bullet

.357 | 158gr | Speer JSP is a bullet made by Speer. At 158 gr (10.2 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 0.164 drives velocity retention and wind drift downrange — higher values mean a flatter trajectory at distance. We currently list 14 load recipes across 14 calibers for this bullet.

Most popular calibers for this bullet

Load data for .357 | 158gr | Speer JSP bullet is available in the following calibers:

• .35 Rem.
• .357 Auto Mag.
• .357 Mag.
• .357 Maximum
• .38 Special
• .38 Super Auto
• .38-45 ACP
• .400/350 Rigby N.E.
• 9 mm FAR
• 9 mm Mauser
• 9 mm Steyr
• 9 x 21
• 9 x 25 Dillon
• 9 x 57 Mauser

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.