My plan is to compete (?) in the 2018 postal match and try my hand at using the TVM Fowler for the October target. Any suggestions as to patch and ball combinations?
Axe
There are lots of combinations of various loads and loading methods you can try in your smoothbore to see what shoots best.
One must always remember,.... that every barrel is an animal of it's own and what works best in one barrel may (or may not) work as well in an identical barrel.
That being as it may, it might take a while to find the ideal load for your particular barrel.
Some smoothbores like a patched ball load, while others may shoot more accurately with wadding and a bare ball. Even the type of "wadding" varies, as some barrels prefer wadding such as wasp nest material or wads made of "tow". Still others may prefer wads cut from felt, or card-board such as milk cartons. Some barrels might even shoot better with a "combination" of the things listed above.
In my personal opinion, a smoothbore will shoot about anything you can stuff down it's bore (reasonably well), which makes it more versatile than rifled bores, but at the expense of "effective range".
Personally,.... I find that I have to burn a lot more powder to find a good load for a smooth bore (with all of it's variables), than powder burnt to find an accurate load in a rifled bore.
As with others here (I'm sure),.... I think half of the fun in finding a good load for a particular smooth bore is the time spent shooting and playing with all the different variables, such as ball size, wads/wadding, and powder charge.
I'm sorry if my ramblin' doesn't exactly answer your question, but anyone working with just one smooth bore has a big advantage over someone (like me) who is looking for the "ideal load" for 5 of these critters and limited time for "fun at the range".
Hopefully others with more "enlightening" info than I have to offer, will share what they know about these interestin' pieces of history and how to get the utmost accuracy out of them,.... although (from the historical research I've done) accuracy didn't seem to be a top priority when usin' smooth bores in the past.