I load a lot of milsurp powder so let me chime in here. I too don't load the calibers you mentioned, but you can google the milsurp powders and find a civilian equivalent to start you off to determine if they will work for your application.
It must be remembered that military powders are bulk grade powders, not cannister grade. What's the difference? Commercial cannister grade powders are blended and coated so the same powder always yields the same burn rate and pressure, and generally the same velocity, whether you bought the powder yesterday or five years ago. Therefore printed loading data can be used for any lot of that particular powder.
Bulk grade powders, on the other hand, are made in large batches which are each tested to determine the burn rate and velocity of that specific lot, and the charge load is adjusted to yield the desired velocity and accuracy. Two different lots of the same powder can require very different loads to work properly.
When you work with surplus powders, it's necessary to start with a low charge and work up more carefully than with a commercial powder, and a chronograph is a necessity. It's also a really good idea to buy a large quantity of powder at one time, all with the same lot number, so you don't have to go through the workup for a newly purchased lot of powder.
You can find a ton of good information on cannister grade powders at www.castboolits.gunloads.com
under their thread "Cannister & Surplus Powder."
Google the powders and you'll find quite a bit of information on them.