Last August, I started this thread on a Double Rifle Drilling, in caliber 10.5X47R, made by Schlegelmilch and Metzner sometime in the late 1890's. Part of the discussion focused on producing cartridges for this rifle and some recommended starting loads. This post details the production of 10.5X47R cartridges and the results of the initial fire forming process.
I decided to alter the rims of the cases instead of trying to head space on the shoulder and used the method as recommended by Mike in the preceding discussion.
Attached are pictures of the punch and die as well as a shot of the tools in the hydraulic press. The little 8 ton press was satisfactory and I was surprised at how consistent the ram movement translated to rim movement.
After bending the case rim forward, the cases are put on a fixture to set the rim thickness and diameter as well as the cartridge over all length.
I used Starline 40-65 cases as the donor case and these fit the chamber without further sizing.
The cartridge charge of 4198 was determined by a formula suggested by Ross Seyfried. I filled the case to the neck with FFg black powder (50 gr ), and then used 40% of that weight of 4198 smokeless powder (20 gr). Then the case was filled with polyester fill.
The original bullets are said to have ranged from 260 gr to 298 gr by COW. I took a 410 gr bullet intended for a 405 Win (.412") and cut it back while creating a hollow base and a final weight of 275 gr.
The S&M is a joy to shoot. The heavy weight of the drilling and mild charge produce minimal recoil. The fire forming produced 20 usable cartridges that fell from the chamber with no signs of excessive pressure.
Now to find a suitable bullet and work up a proper load. Anyone with any suggestions?
Otto
