I got them from Dr. Ken Howell's _Designing and Forming Custom Cartridges for Rifles and Handguns_, ISBN 0-9643623-0-9, one of the best $60.00 investments I've ever made. Your local Carnegie library should be able to get it for you on interlibrary loan.
I know nothing of the Davis, except that it a shortened (1.6") .348 case with a sharp shoulder. The case displaces 98 grains of water.
Google will get you some data on the old Werndl gun and cartridge. I make mine from .348, though the rim is a tad bashful. The case displaces 127 grains of water, and is listed as the Gras 11x59R.
Regards from Grayest California,
claybyrd, Sounds like an interesting wildcat, but you may run into bullets problems. 44 caliber bullets are probably designed for the top velocities of the 444 marlin. The Barnes X bullet may work. You could use a cast bullet with a large meplat like the LBT styles. Cast of wheel weights +2% tin and oven heat treated, you may be able to get them up to the velocity potential of the cartridge. You might want to give the bullet manufactures a call and find out what the maximum velocity their bullets will stand up to. 8)
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