VAshooter - the guys with ML's actually have an advantage over the fellows shooting Sharps, other falling block or Rolling Block rifles due to their being loaded from the muzzle. A good ML with good shooter gives up nothing in a contest to the fellow with fixed ammunition, as long as time is not involved. The ML will have less vertical dispersion due to extreme velocity variations, shot to shot, than the fellow shooting a BP ctg. gun. The ML can be held to 5fps with good loading & cleaning practises. Good loads in a ctg. might run double if really good, or 3 times that, normally.
The shooters with muzzleloaders most definitley would have been shooting elongated balls (bullets). Many of the most popular calibres of round ball, for example .45 and .50 - maybe even to .58, will not maintain flight that far- 1,000 yards is a long distance for a round ball to travel, hense the shotgun/ML only seasons and areas set up 30 years ago.
This is easily demonstrated using a computer generated bullet drop program. Once the drop exceeds the maximum height above the ground level the gun was fired from (ie: bench + bags height of 40" -+ trajectory height) the ball has then struck the gound.
It's fun to play with this, as increasing the height even further, results in a shortened maximum range. So- this must be done to ensure the maximum range is found. This holds true with all projectiles - and the alngle for maximum range is less than 45 degrees, of course. If shooting from a hill crest well above the target, the elvation above the target at discharge will increase the absolute range considerably but will it's accuracy range be increased?
I'm not sure if it's still available, but the "Point Blank" computer program used to be a free download- ie; google it just to find out.
I still use Point Blank and find it quite accurate to my ML's as well as my .17 "Rat Guns", as long as care to actual sight height above the bore axis is observed. Eleveation and even temperature have an effect on trajectories. It's computed trajectories very closley matched what I get an the fairely expensive Sierra Program as well.
Many of you know this stuff - so ignore my rambling - unless I make a mistake of course.