I can't even conceive of hitting a target that far off! Not sure I could even SEE it.
The prices of propellants and pretty much everything else is ridiculous right now. Triple 7 was a little over $40.00 American last time I saw it on the shelf. Not even going to talk about the price of eggs, gasoline and beef lately. I haven't actually bought any Triple 7 in about ten years... still using what I bought back then. I've got three horns, each with Pyrodex, Triple 7 and Old Eynsford and have a couple pounds of Old Eynsford on the shelf in reserve. I'll be buying more black powder as soon as Goex goes back into production... if it ever does.
In these times there really is something to be said for small caliber guns!