Last couple times I moose hunted with the .69, I loaded the first shot with cloth-patched round ball with Track's Mink Oil for patch lube. I needed a second shot on the first moose and had that one into the moose in less than 10 seconds (been timed a few times to get it down) using a paper ctg. He had time to merely turn around and give me his other side. That was it.
In training I was able to make the 2nd aimed shot in 8 seconds, using the noted tapered paper ctg. I kept my priming wheel (capper) filled so there were no blank spots. Capping was simple and fast.
The British solder, had to pull the cock to full bent, then rip the end of a ctg. off with his teeth, then prime, then close the 'hammer', then shove the remainder of the paper ctg. with the ball into the muzzle, then pull out 40" of rod, then ram the ball home, and throw the rod on it 3 times. He then raised the gun, pointed it and fired. Usually these loading and firing was on and by command, I think, thus would take longer than someone practicing and doing it on his own at his own pace.
I did not test to see how many I could get off in one hour - that would have been interesting indeed, considering the British Musket shooters were required only 3 per minute. I'm sure that even today, 25 years later, I could still do 4 in a minute - shooting on a plate (deer kill zone size) at 50yards - or 100 on a moose's kill area zone.
Note, to be accurate, ie: as accurate as patched round balls, they have to be snug in the lands with the lands actually impressing into the paper patch.
The Americana Military found out about tighter meaning better accuracy after enlarging the ball's size a mere .010", to .650" from .640". (Firearms of the American West 1805- 1865). The increase of .010" doubled the hits on their test targets at 100 yards out of 10 shots, from one hit in 10 to 2 hits in ten, consistently, so they increased the size that amount - sometime around 1820, I think it was. Considering their muskets ran the gauntlet of size from .69 to 70, they still had considerable 'windage'. Going to a swaged ball increased the hits as well, as it removed the sprue which can cause spinning & curve balls by the air the ball is passing through.