The direct conversion from 2200 BAR to PSI is 31,900 PSI. The SAAMI pressure rating for the 45-70 Gov't is 28,000 CUP, while the CIP rating is 32,000 PSI. So the 2200 BAR is the CIP pressure rating.

found this data so it should take a good hornaday factory load and not just the weeney trapdoor load this is starting to look better and better.