RE: T/C maxi ball
I haven't tried the maxi's in my Knight.......yet - but I have been considering it. Since they are pretty long & heavy, I think you'll be pleasantly surprised at how well they may shoot.
They would also be as good or better than round ball for breaking in the barrel at this early stage.
"Every moving thing that liveth, I give unto you as meat" (Gen 9:3)
Trust God..........but keep your powder dry!