50/70 and 12.7 Papal remington

I would like to know if these two cartridges are interchangeable.I have seen both of them and they seemed identical

Thanks
Pivi

ab

Yes,it was.I have asked this thing because in all the books I have read these 2 cartridges are described separately.It should be the same cartridge with another name

Hi
Pivi

ab

Yes, the two cartridges are strictly similar.

Cheers

Philippe