The burning velocity of this Serious Extruded propellant has been known toshooters for decades. After a while, Hodgdon has modernized H4350 powder by shortening the grainsfor enhanced metering and which makes it insensitive to sizzling/chilly temperatures. H4350 is great incartridges like the 243 Winchester, 6mm Remington, 270 Winchester, 338 Winch… Read More