Might be fun to play with. My guess is that it would not beworth the effort, but you never know. I have no idea where you would get a sabot to fit a ball that small.
I'm afraid I'm going to have to give you a homework assignment
Gearhart. Try cutting the .50 sabot down so that the petals are about 3/8" long. Thentakea strip of paper 3/8" wide and wrap it around a dowel the size of a .36ball to make a sleve/tube that fits fairly snug in the sabot.
You might have better luck withseveral thick well greased patches and a light charge. I have some balls that mic at .395. I just tried them in my .45 GM barrel with a double .020 denim patch and they look like they might fit pretty well. I also tried them in the .50 Renegade barrel with triple patches and they would fit that pretty well too - but there's a awful lot of patch material between the ball and the bore.
Man, I do not need another thing to experiment with. But I just might have to try them in the .45 the next time I take it for a spin.