10,35 (10,40) Italian Ordnance

A.K.A. 10,35 x 20mm.

A black powder cartridge from 1874.

Bullet diameter10.72 mm (.422")
Neck diameter10.95 mm (.431")
Shoulder diameter10.95 mm (.431")
Base diameter11.68 mm (.460")
Rim back13.06 mm (.514")
Rim thickness2.60 mm (.102")
Case length19.95 mm (.785")
Cartridge length30.13 mm (1.186")

I have no idea where the 10,35 or even the 10,40 measurement comes from, the bullet is 10,72mm, the lands are around 10,6 / 10,65 and the grooves presumably somewhere in hetween.

You can make ammo using 44-40 or 44 Special / Magnum brass, a 303 sizing die, and a 45ACP seating die. You need to size 44 caliber (which is actually .429") bullets down to .422".


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