Thanks for the info Clark. Yes - as I figured as well. According to "Firearms of the American West", prior to the civil war, buck and ball ctgs. were issued and used more than 2:1 to single
ball ctgs. Also, there was a buckshot load for their .69(& .70) muskets that contained 9 balls. Oft times these were loaded in the night guard duty muskets for shooting at prowling "wolves"
in the dark. The odd time, their "yelps" told of hits. Of course one assumes these 'wolves" were 2 legged.
The buckshot actual size, I do not know, but likely 00 (.32) as those should "nest" properly in a .69.
It takes a 12 bore to "nest" in layers of 3 balls, .360's(000). Yes, Hornady's 000 (triple ought) are .350" - just the way it goes sometimes.
In modern shells, due to the paper or plastic hulls, 00 nest properly, but are then loose in the bore.
As to the outside lubing the outside of the paper ctg. around a ball, I've not found that to be necessary for the rifle, where I am able to shoot 10 with perfect accuracy, then shoot a cleaning load
of a very wet patch, .682" ball with 82gr. of 2F. This cleans the bore to where I can fire another 10 paper ctgs. 10 shots is more than I even carried, while hunting moose. I used 2 once.
I was aware of the use of muskets during the civil war. Prior to the war, muskets with thick enough barrels for rifling, were returned to Valley Forge(I think) and Springfield for rifling, for use with
the 730gr. Minnie. The model 1842 Musket, the last of the .69 muskets, was a favourite of some field commanders, as noted in the book. The Minnie's charge was 70gr. I think, but not sure if the
model of 1812 was also rifled. It was noted, seems to me, that many of the muskets had their barrels too badly worn for rifling, due to the constant rubbing with ramrods & other materials for commanders who demanded a polished barrel.