2 1/2 drams of Curtis and Harvey's #6 sporting rifle powder would be equibalent to 2 1/2 drams (68gr. of Swiss 3F) or about 3 drams(82gr.) of GOEX 3F.

Not sure what the bullet or ball weight would be, but it would be slow. With around ball of 300 to 320gr., it might make 1,325fps and of course, less if a conical.

I would not call it a 100yard bear load, but much depends on the bear and accuracy of the load.