Smith Carbine: Original Load Data?

[Spunk Puppy]

Hello all! I am thinking about buying a Smith carbine replica from Pietta. I understand that Dixie Gun Works sells black plastic cases for these rifles that look similar to the originals, but they only hold about 35 grains of powder when topped with a .515" 360 grain bullet, firing the load at about 750 FPS. I remember reading that original Smith carbines used 50 grains of powder, and would fire the same bullet to about 950-1000 FPS.

I am wondering if anyone knows the true load data for original Smith carbine cartridges? If they really did use 50 grains of powder back then, why are today's cases limited to just 35 grains of powder? I'll have to admit that power drop is one reason that I'm hesitant of ordering a Pietta Smith carbine... I would want it to have the same ballistics as an original.

If any Smith carbine shooters are out there, please let me know if you have the answer. Thanks!