Current manuals show 150 gr of Pyrodex RS (loose) is allowed. The max load in the current manual is 150 Gr FFG and a 400 Gr bullet in a mag express sabot. Heaviest conical load is 370 gr Maxiball and 150 gr. of FFG. They also show 3 pellet loadings with those bullets. The last I knew they still prohibited more than 100 gr of loose Triple Seven in their rifles, but 3 pellets were allowed.

Knight max is 3 pellets or 150 gr of loose. Triple Seven, Pyrodex doesn't matter. This is in their current production magnum rated rifles. There is no max bullet weight listed. The heaviest bullet shown in the ballistic table for 50 calis 310, in .52 it's 375.