Hodgdon, I believe has data in his manuals - #24 and #25.

A query to them should turn up data. As the case capacity is virtually identical to the 6.5x55, starting with the Swede's starting laods and going from there is a good beginning. As with any data, always start low and work to pressure signs, up or down.

What works in someone else's rifle will probably not work in yours and could be dangerous as well. Always start with a starting load - never with someone else's 'pet' load.