Shamus,

I will add that when researching reference hand loading data for my .280 Ross double rifle I accumulated a fair amount of information on the Ross and Halger loads. They are both way too hot for a double rifle but the data may do you some good when you get around to hand loading for your new toy. The loads that I use in my double may be good starting loads for your gun so let me know if you would be interested in seeing them as well.

Regards,

Buchseman