CraigOry, this isn't a flame so don't take it that way. If you don't have a reloading manual, either buy one or go online to the powder manufacturer's site and get the information you need. Not because you aren't welcome to ask here because you are. Some of the answers you will get will be based on emotion and as in your case guesstimates. There will usually be a light of sanity and will give you facts and figures from a manual.
There is no better insurance money that you can spend than to pick up a reloaders manual. They sell cheap at gun shows, if your pennies are pinched. Unique is a fine powder when used under proper conditions for the cartridges it was designed for. It is quite broad spectrum but isn't bulky, so it will leave a lot of air space in a large case.
There is no better insurance money that you can spend than to pick up a reloaders manual. They sell cheap at gun shows, if your pennies are pinched. Unique is a fine powder when used under proper conditions for the cartridges it was designed for. It is quite broad spectrum but isn't bulky, so it will leave a lot of air space in a large case.