Thanks Parashooter!
That is precisely the handwritten data sheet I referred to earlier, without being able to find it myself. If I remember correctly, this data sheet was composed by David Emary (or is it Emery?) for Hornady, and what bothers me is that, as far as I am aware, this data never made it into a printed recommendation from Hornady itself.

Note the narrow ranges of the powder weights - the balancing act between providing enough thrust to ensure that the oversize bullet is forced through the rifling and does not just plug the barrel, and providing so much thrust that direct overpressure from the powder burn causes a hazard.

I find the old Carcano bullets with the slight rim on the open base that (presumably) upsets to form a small driving band to be ballistically more convincing - and less hazardous!


Patrick