Originally Posted by
bmcgilvray
If I were going to handload for everything in my personal firearms menagerie, from the .25 ACP to the .44 Magnum in handgun cartridges, from the .22 Hornet to the .375 H&H Magnum and .405 Winchester in rifle cartridges, along with all gauges of shotguns, and do it all with a single propellant, I would choose Unique. It actually could be done quite easily and would yield safe and nominally effective ammunition.
However, one doesn't want to be constrained to shoot .30-06 ammunition that is significantly less powerful than the 7.62X39 so trying to go to one single powder isn't practical at all except in a survivalist scenario.
It would be far more practical to at least settle on two for the cartridges you list.
N320 is a good deal quicker burning than good ol' Unique and would have little practical application in the .30-06 unless one wanted to make up some sort of specialty round ball load using 0 buckshot pressed into the case mouth for shooting small pests at short range. At least Unique can propel a 150 grain jacketed spitzer bullet to nearly 2000 feet per second with a safe powder charge.
Useful loads for all the handgun rounds you mention could be made up using N320 but throwing .30-06 into the mix distorts things too badly. Surely you aren't currently using N320 for .30-06 handloads.