The fellas on the BigBore forum at MarlinOwners.com reference the Realgun data regularly for their leverguns, so I wouldn't hesitate to use it, just be sure to reduce the loads by 10% as they are max loads. Although they indicate they are Ruger loads, they aren't max for the Ruger. If you compare some of the Hodgdon powder data with the Hodgdon Annual data, you'll see they're trapdoor to lever action loads, depending on the powder, all well within safe SB2 levels, although the recoil may not be considered safe!!! :eek:
Tim