Lovely rifle - it is all there - thanks for posting

I personally would stick to Black Powder, it is what the rifle was designed for and the pressure build up is different to nitro

If you must go to nitro, on similar cartridges/ bullets I have used 35 grains 4198 but magnum primers are a must (on your own head be it!!)

I am sure Daryl will give you better advice than me if he sees this thread

Good luck and good hunting

TH44