With Reloder 17 reloaders have a powder that meters easy and consistently while providing maximum velocity even in extreme weather. This consistent performance is what reloaders have come to expect from Alliant Powder, and Reloder 17 doesn't disappoint. Designed for short magnum case capacity. Similar burn speed to IMR 4350. Meters easily and consistently. Consistent maximum velocity in extreme weather conditions. Principal Purpose: Short Magnum Loads. Secondary Uses: Medium Rifle Loads. Remarks: Similar burn speed to IMR 4350 with added velocity.