Help with bullet id


#1

Found a bullet under a torn up side walk and would like to know caliber and age.
Says Western and it has -17 on the bottom of casing.It is 3" long and the casing has a small lip like it may be for a single shot rifle.The slug part has a flat end on it.
Any help is greatly appreciated!!


#2

Photos or scans of the base and case profile would be very helpful. The information provided so far is inadequate to provide an accurate identification.

The “-17” sounds like part of a military date code. The US was producing quite a bit of ammunition for the Allied powers even when we were nominally neutral. With a rim, this could be for a Russian or British contract; also possibly, but less likely, for the French. All these possibilities are different cartridge types and there are others, even less likely.

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#3

First thought is that it is an 11mm Vickers/Gras cartridge. More detail and a picture will confirm.