in a cartridge facsimile is transduced into an electrical signal by a foil strain gage and fed into a signal conditioner the amplified signal is recorded by a digital oscilloscope allowing the operator to determine the force and energy expended by the firing pin application_number US 36145989 A description a preferred embodiment of the present invention is herein described in detail referring to fig1 a firing pin force transducer 10 is designated generally by the number 10 the cartridge facsimile 2 fits slideably within a firing chamber of a firearm not shown in the present embodiment the cartridge facsimile 2 is substantially the same size and shape as a shell casing of ammunition for the firearm the cartridge facsimile 2 has a forward end 4 and a breech end 6 both the forward end 4 and the breech end 6 of the cartridge facsimile 2 have an aperture the forward end aperture has cartridge threads 8 while the breech end aperture 12 is sized to be substantially the same as a cartridge primer a rod 14 is disposed within the interior void 16 of cartridge facsimile 2 rod 14 is fixedly attached by rod threads 18 to cartridge threads 8 at the forward end 4 of cartridge facsimile 2 at.