The Lock-N-Load AP Powder Funnel Die is designed to load precision cartridges on an AP press by allowing the use of a powder scale to weigh individual powder charges. Most common rifle and pistol cases are compatible, ranging from .22 to .50 caliber. This is accomplished by the use of two interchangeable bushings. Always use the largest insert possible. The large bushing will accommodate cases as small as 7mm, the small bushing as small as .22 caliber. Smaller cases, such as .204, may be used, but caution should be taken to avoid powder spillage.