Hornady Shell Holder 11

The Hornady Shell Holder #11 is a universal reloading component primarily designed to hold rimmed cartridges with specific case head dimensions, most notably the .303 British and .30-40 Krag. Machined from solid steel and heat-treated for long-term durability, it is compatible with most single-stage and turret presses in the industry. 
Precision Reloading
Precision Reloading
 +4
Cartridge Compatibility
According to Hornady and Precision Reloading, the #11 shell holder is specifically required for the following calibers: 
.303 British
.30-40 Krag
.303 Savage (per cross-reference for similar rim dimensions)
444 Marlin