[John Rogers]

To see a lot about 1000 yard muzzle loader matches, fire up your Google and search on "World Championship Muzzle Loading Matches" and there is a ton of neat info, pictures and even some technical info on how-what-when-ETC of black powder long range shooting.
Here is the first site that showed up: https://www.all4shooters.com/en/shooting/culture/2018-world-muzzle-loading-championships-pedersoli-scoops-up-medals/#