I have some Authentic Swiss Black Powder - Supreme Black Powder in 16oz unopened bottles in 1Fg and 3Fg. How long does it last and if I stop shooting BP, how do I get rid of it? Can it be resold?
Welcome to the Zoo!
First:
1F is typically cannon powder, perhaps fine in a blunderbuss but I have only used 2F in mine.
3F is typical 'all round caliber' powder however charts will tell you it is for "smaller caliber" ie 45 and below.
Swiss is slightly different from all the other powders mentioned here in that 1F is 'sold' as Cannon powder then Swiss has 1.5F and 2F with is considered 'large caliber powder' (say 75 down to 50 caliber), then line all other powders they have 3F and 4F where 'typically' 3F as mentioned is small caliber (45 and less) and 4F is their Priming Powder.
NOW, Swiss also has the 0B (Null B) powder, extra fine and fast burning primer powder sold in 1/2 pound bottles.
So; basically what you have is one pound of Cannon powder and one pound of small caliber rifle/pistol powder.
Courius however you came by it and don't know about....?
Now "Selling": you can NOT ship it, not legally, and if caught you will go to jail and be hit with a heavy fine!!
But to 'sell' it Locally to another shooter....well, ya I suppose it would be "illegal" (also different states have different rules where storage and transportation is considered) - but; person to person, in person, who is to say they did nit go in on a Bulk Purchase with you (Depending on YOUR local laws)??
We go in on bulk purchases all the time, frie ds who are without and going to an event or hunt drop by a 'buy a pound' - no harm...maybe 'foul' legally, but not Selling it as in you are keeping a stock pile and selling for Profit.
If you know a friend who shoots and you want to 'get rid of it' - give it to him, sell it to him...would be a shame to dump it because some told you "You Own It, Your Stuck With It!"
...besides, you clearly don't know about it, how did you come by it?