Description

HSM’s Cowboy Action .357 Magnum 158 grain semi-wadcutter is a traditional-style load developed for cowboy action and target shooting. These rounds are produced at moderated pressures for reliable function in period revolvers and similar firearms. The load uses hard lead semi-wadcutter bullets in new-production, non-corrosive cartridges with brass cases. Cases are listed as reloadable and the ammunition is described as boxer-primed.

Key Specifications

• The cartridge is .357 Magnum.
• The bullet weight is 158 grains.
• The bullet type is hard lead semi-wadcutter (SWC).
• The listed muzzle velocity is 1175 fps.
• The listed muzzle energy is 484 ft-lbs.
• Each box contains 50 rounds.
• There are 10 boxes per case.
• Case material is brass.
• Cartridges are described as boxer-primed.
• Cases are reported as reloadable.

Designed to match the needs of cowboy action competitors and shooters who favor traditional loads, this HSM offering provides a period-appropriate profile with modern, new-production components. The hard-lead SWC bullet and moderated pressures make it suitable for older-style revolvers and target use while brass, boxer priming, and reloadability support handloaders and range work. If you seek a straightforward, historically styled .357 Magnum load with serviceable velocity and reloadable brass, this Cowboy Action 158 gr SWC round is a practical choice.