RCBS 3 Die Roll Crimp Set - Legacy .40-70 Sharps Straight

The RCBS 3 Die Roll Crimp Set for .40-70 Sharps Straight is purpose-built for handloaders working with legacy black powder cartridges in original or modern reproduction rifles. This three-die configuration supports the distinct reloading requirements of straight-wall cases, delivering the precision and consistency required for accurate black powder rifle shooting.

The set includes a steel Sizer Die that sizes the case body and removes spent primers—cases must be lubricated prior to sizing to prevent damage. The Expander Die opens the case mouth to the correct diameter to accept the projectile with proper fit, and the Roll Crimp Die applies a secure roll crimp around the bullet's cannelure, which is essential for black powder loads where bullet pull and case integrity directly affect ignition and ballistic consistency. This mechanical crimp approach differs from modern centerfire reloading and reflects the specific geometry and pressures of .40-70 Sharps ammunition.

This die set is designed for dedicated black powder cartridge shooters who maintain original Sharps rifles, Sharps-pattern reproductions, or custom builds chambered in .40-70. The Legacy series from RCBS acknowledges that despite continuous introduction of modern calibers, black powder metallic cartridges retain a dedicated user base—from historical reenactors to long-range precision rifle enthusiasts seeking the ballistic and mechanical challenges of period-correct ammunition. Proper setup requires a compatible reloading press, appropriate primers, and black powder, making this an investment for serious handloaders committed to the discipline.