Powder - A single power will make life easier. A ball power will throw almost perfect loads, so that would be my choice. Win 760 or H414 (same powder) would be good for those two calibers.
In order to size the brass, you must lubricate it. I lube about 100 rifle cases at a time in a round jug using Lee lube:
If you are sizing a few cases, the case lube technique does not matter very much. If you have a bucket or two of brass to size, there is a fast efficient way to lube the cases. I lube 100 or so cases (rifle) at a time. Takes about 30 seconds.
I use Lee case lube. It is a water soluble cream that is easy to clean off.
Dump brass in a plastic pail that has a lid.
Then take a 1/2" worm of lube and smear it around the top inside wall of the pail. Picture shows too much lube.
Put lid on and swirl and shake for 15 seconds. This will lube all the cases and deposit a tiny dab on the case mouth, to lube the expander button.
In order to size the brass, you must lubricate it. I lube about 100 rifle cases at a time in a round jug using Lee lube:
If you are sizing a few cases, the case lube technique does not matter very much. If you have a bucket or two of brass to size, there is a fast efficient way to lube the cases. I lube 100 or so cases (rifle) at a time. Takes about 30 seconds.
I use Lee case lube. It is a water soluble cream that is easy to clean off.
Dump brass in a plastic pail that has a lid.

Then take a 1/2" worm of lube and smear it around the top inside wall of the pail. Picture shows too much lube.

Put lid on and swirl and shake for 15 seconds. This will lube all the cases and deposit a tiny dab on the case mouth, to lube the expander button.