I shot a deer years ago w/a 240 SWC atop 10.5 Unique in my M29 4".......magnum cases. Clocked 1050.
Later used 9 gr of Universal Clays for similar speed, cleaner burning and metering in a Ruger SBH 4 5/8.
I can tell you when I had the 29, I shot a willow tree on the banks of the Red River here, sailed right thru slamming the water at an impact that one would NOT want to have hit them. That tree was around 8-10" thick....
SO, as above, when you get around 1k, you will have PLENTY penetration w/a hard cast at nominal handgun distances IMHO.
I'd look at U. Clays personally for your Special.
