Strange mark on cartridge


#1

Hello
I have a 45/70 cartridge with 500 grain bullet and black powder. It is made by U.S.Cartridge Co.
It has a domed copper primer with a "dollar sign"pressed into it.It is the first time that I have seen anything like this.
Is this marking common?
I would also like to know the time rame that this cartridge was made in.
Thanks,
Frank


#2

The primer sign is actually the letters “U.S.” in an intertwined trademark-style of pattern. It is very common on U.S.C.Co. primers of a certain era and appears on many, many calibers. I have it on just about every auto pistol caliber U.S.C.Co. made. Sometimes a weak strike or slightly tilted cup will be missing elements of the design. It sounds like yours might be missing the curved portion of the bottom of the letter “U”.


#3

In many cases, primers were marked with ‘U’, ‘W’, ‘P’, ‘US’, etc. to indicate an improved priming compound for smokeless and/or Lesmok loads.


#4

My records indicate the U over S on the primer was used to represent the smokless powder load. It was also used when USCCo was loading ammunition for Savage Arms. Vic


#5

Vic
There are 29 cartridges in this goup. All have black powder and small diameter domed primers with the U and S on top of each other.This, to me,looks like a dollar sign.
I get the feeling that these marked primers are on later manufactured cartridges.Did USCO continue making black powder cartridges into the 1930’s?
Thanks,again
Frank


#6

My source of information comes from a few catalogs that I have. The copy of 1908 Does not show any stamp on the primer ,but the 1914 catalog that I have shows US on the primers of Black or Lesmok powder for pistols and rifles. For the smokeless the U over S primer stamp appears for both military and commercial pistol and rifle rounds. It would be nice to see a newer catalog close to the 30’s before they got sold. Vic


#7

vic
Thanks;that’s all that i need to know.
Frank