Lee Long Charging Die is for use with the Auto-Disk, Pro Auto-Disk and Auto-Drum Powder Measure. Works with cases 1.760 to 2.620 inches long (223 Rem to 300 Win Mag). Works the same as the pistol Powder Through Expanding Die, except it doesn't expand the case mouth. Rifle case expansion is done in the sizing die. For cases .860 to 1.760 inches long, use the Short Charging Die, Midway part # 775-374. Steel die comes packaged in a plastic storage case. Shellholder sold separately.