I started at 20gr. 3F and a patched .311" ball in my .32 Tenn. rifle with a cut rifled barrel- .008" rifling, very narrow grooves - opposite what I prefer.
At 25 yards, it would, of a bench, put 5 consecutive shots into a .45" hole. That grouping would measure .139" on centre to centre measurement.
At 50 yards, that 20gr. charge shot those .311" balls with .020" patch, into 2 1/2"- in other words, to obtain accuracy at 50 yards or further, I needed MORE powder.
When I hit 35gr. 3f GOEX, same ball and patch, the rifle gave me consistent 1" groups, on centres - ie: all into a 1.311" group.
When I sent up in ball size to .320", same patch and maintained the 35gr. 3F load, the ground enlarged to 1 1/2". As I increased the powder charge to 40gr., the group then decreased in size to just under 1". The increased accuracy and velocity will now make the right slightly better for woods walks, locally & at Hefley, as ranges run up to 110yards, or so.
With the loads listed above, I used the rifle's hickory rod without any trouble loading. I also used a short starter with a 6" main shaft to get the patched ball well down into the bore before using the rifle's rod. The 'purchase' of the rod in the bore helps protect the rod from damage.
As no time did the rifle need wiping while shooting - as only one shot's fouling was in the bore at any one time and that, being damp from the lube, was easily pushed down with the next patched ball when loading.
IF your .32 'fouls and needs wiping' YOU ARE DOING IT WRONG.
Even at 40gr load, my .32 is my easiest loading rifle.
in my most humble opinion, of course.
Of course, this is for high velocity shooting for trail walk and "accuracy" shooting - as in bunny or squirrel heads at 50 or 60 yards. It also hits the bunny target at 100yards with regularity. My rifle will not shoot accurately with light loads, past about 30yards. It just goes to pot.