Duck

I would say that with the load you suggest there would be a huge fireball out the end of your barrel.
Not enough pressure to burn all the powder.

2.5" groups at 100 yards is all I could get with them. I have some machined sabots so I can shoot 180 grain 30 cal's out of my 460X510!

100grs of 3031 should make the ole chrony sing.

Neal