They HAVE BEEN Shooting 1 mile with Black Powder (BPCR) and OPEN sights for Several years now. Kenny Wasserburger, They have a Shoot called “The Wasserburger Mile” Basically all they are doing is Trying to Hit a VERY LARGE Target (You can’t hit what you Can’t see, unless it’s an accident) But just the fact that they do Hit it at 1,760 Yards (1 Mile) with OPEN/PEEP sights and Blackpowder is pretty Darn Cool.Those World Championship shoots you're mentioning, are ONLY for black powder shooters and traditional rifles or, BPRC's. There is no such thing for modern inline rifles, short of the NRA Championship shoot, which by the way is only a week or so away.
Mark my words...……… black won't hold a candle to the BH shooters, who will end up NRA Champions again. Best and most consistently accurate propellant on the range.
As for ELR, there are guys out west that have been shooting BH209 to 1,000yds and well beyond for a number of years and, are very good at it. I'm told by one of them, that next year they are going to push it to a mile (1,760yds).
Next bottle someone gets that they CLAIM it was stored and handled properly, used in a firearm with a breech plug designed to shoot it, used the proper loading procedures and followed Western's directions and it won't fire properly, send that bottle to me.
A modern inline like my BONE STOCK Knight Mountaineer would be no problem if i had enough elevation to get there, The Rifle is PLENTY Accurate with my own Poured Paper Patched Bullets With a Custom such as your “DUNAMIS” 1 Mile Should be SLEEZY EASY