Powder Problem

Without a doubt, the SAFE answer is to ditch the powder. Especially in this day and age, where powder is readily available, and especially if it is only 2-3 lbs. Not even worth bothering with, really...

It's not 100% safe, it may not be responsible, it may blow up your gun or your hand. But using it is probably not impossible to use it if you have some informaton and know what you are doing. If you don't know what you are doing, you will probably kill yourself.

The safest approach is to dump the powder and move on.:)
 
Liberal-hater has it exactly right. And depending on what you think is "a large amount" it could be worth figuring it out. I don't know what IMR 4198 looks like; but IMR 4227 is a very fine powder, cut so short it almost looks like sand. If the extruded cylinders are much longer than they are wide, it's not 4227.

If you are going to make blanks it should be a fairly fast powder. The Canadian 7.62 NATO blanks from the late 70's used a flake powder in the RedDot/GreenDot burning range.

When Bruce Hodgdon got a whole hockey-sock full of 20mm Oerlikon cannon ammo in the 1950's, how do you think he figured-out it'd be a good powder for the 7x61 S&H? Do you think there was load data available?
 
No BFA with these one, just a straight 8mm and .303. Actually I will call the lads to NRCAN-ERD, as I worked there during the summer.
 
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