since this one has sat in the rafters for a while ...
i thought i would make a report.
currently i load these bullets over 18.5 gr of win 296, working into this load using data provided by Cast Performance
http://www.castperformance.com/
recoil is stout (left grip marks in my hand) and accuracy is, well, they seem accurate but i need more practice (3" groups at 10 meters). i suppose this is sufficient for the intended use.
i would like to record some chronograph readings and perform some penetration tests into wet newspaper, but have not had the time or opportunity to date. if i had to guess i would put velocity in the 1200 fps range (~850 ft-lbs).
all-in-all i am quite satisfied with this heavy .41 caliber thumper.