Ok, gonna post something for you to think about. This was for a primitive rendezvous crowd, right? The expectation is that the gear you are going to carry should be contemporary to the period in time you are seeking to portray, correct?
Just how many people 200 years ago carried a powderhorn that looked 200 years old?
Something to think about...if it was meant to look like an original, it would look new or at most would have the marks of normal wear and tear. I've seen guys drop $2,500 on a custom flintlock rifle and it looks indistinguishable from one carried in 1778 by the Over The Mountain Boys that kicked Colonel Patrick Ferguson's butt on Kings Mountain in Georgia. I guarantee none of those fellers that depended on keeping their own hair and that of their loved ones had rusty, pitted barrels or srocks that were cracked, weathered to heck, or gussied up with "mountain man" brass tacks. A common grade rifle, one without any real ornamentation or fancy carving/wire inlay/german silver doodads cost the equivalent of a working man's wages for a year. Not likely he'd have let it go to pot, especially since it was the first and often last line of defense in a world that saw more personal violence than we care to admit to today.
Ok, getting off my soapbox. Sorry if I sounded sour. And it's still a cool powderhorn, and you got no reason to be ashamed of it, despite my rant. It's just something as a historical re-enactor that I notice when I see first person interpretation. Next time at the range, just imagine my face on the target and blaze away, hehehe.