Power Pro 4000-MR offers superior velocity and Lot-to-Lot uniformity. A spherical powder designed for magnum rifle calibers, the 4000-MR powder delivers improved velocity and density for easier metering. Because it’s designed for specific cartridge and applications, it will allow reloaders to create a load similar to factory loaded ammunition. the 4000-MR powder offers superior performance for 7mm and 300 Winchester Magnum cartridges.
Warnings from the Manufacturer:
- Do not exceed the loads displayed in the reloaders guide.
- Never mix any two powders regardless of type, brand, or source.
- Never substitute any smokeless powder for Black Powder or any Black Powder substitute.