Why carry a windex bottle with you when a little spit will do.I realize everyone does things different and what works for one don't nessary work for another.
A fellow got me to zero his knight disc in last week,He brought the bullets (240 xtp,250 sst,and 245 PB) and t-7 pellets.
I was leary of the t-7 because I had shot over 4 lbs of it the summer before and didn't like it at all in 5 rifles.But he wanted to use them so I did.Started out with 2 pellets and the sst 250,spit patched after every shot,took 5 shots to zero @100 yds,let the barrel cool for a long time while I shot other rifles and the first 3-shot group was .998 in and the second group was 1.04 in.
Took the rifle and target back to him and he was happy.Some rifles it is easy to get to shoot good and some are not so lucky,sometimes you have to try a lot of different things just to get a 3in or better group.And to I haven't seen a knight rifle that didn't shoot ok.
Below is the kind of groups I strive for out of my muzzleloaders.