Re: Shooting in the rain - on December 22 in the unfrozen wasteland...
You got a good barrel there. Here are my drops, base info is a 26" T/C Encore ML, 150 gr. 777 pellets, 250 T/C Shockwave, Win. 209 primer. 9x scope in MK4 rings, T/C-Warne one piece steel base.
Accuracy stayed slightly under two moa. We were shooting in very light wind from 3 o'clock, light drizzle, temp just barely above 0 C.
I would have taken this farther but we only needed to go to 250 for this test and also we pretty much ran out of light. I have shot past 300 a lot, made several kills at that distance, longest was 343 yards.
With the accuracy you describe I see no reason not to go to 350. Surprising how much energy those big slugs have out at longer distances. Your Knight is shooting about as well as we can hope given the variables imposed by muzzleloading.
Best wishes for Christmas.