Shooters have known for decades that Hodgdon H4350 Extreme Extruded propellant has a fast burning speed. During that period, Hodgdon enhanced H4350 by reducing the grains for better metering and making it temperature insensitive. In the WSM family of calibers, the H4350 is suitable (270, 7mm, 30, 325). H4350 is used in a variety of cartridges, including the 243 Winchester, 6mm Remington, 270 Winchester, 338 Winchester Magnum, and others. It’s unbeatable for magnums with mild to moderate bullet weights!
The Use of Smokeless Powder Should Be Avoided:
Do not exceed the reloader’s guide’s load limits.
Mixing two powders, regardless of type, brand, or source, is never a good idea.
Never use a smokeless powder in place of black powder or a replacement for black powder.