Beenthere;
I can assure you, the .36 even with a patched ball, is plenty good for small game.
I get plenty of velocity, 1400+ fps with 30gr 777 with a ball and about the same with a hollow base SWC that weighs about 85gr, going up to 35 gr did not help the accuracy, actually going down to 25 gr did help, still 1250 fps.
The SWC is about twice as accurate as the patched ball, less than 1" at 25yd compared to 1 1/2" for the ball.
You really should try it on a chuck or two if they are available where you are
Don