Unique is good for middle to maximum loads in a short case. I use 6.0 to 6.5 grains for 230 grain .45 ACP, and it burns clean with little smoke. It's just bulky enough that it nearly fills the case. I use a slower powder, like 2400, for high-pressure, high velocity loads in .357 Magnum and mid to hot loads in .44 Magnum., where it nearly fills the case.