robinb Posted November 16, 2020 Share #1 Posted November 16, 2020 No markings of any kind. The shell in question is exactly the same as a .60 caliber shell, but is in .50 caliber. Any ideas? Link to comment Share on other sites More sharing options...
BruceCanfield Posted November 16, 2020 Share #2 Posted November 16, 2020 Looks like a .60 caliber AT rifle cartridge. Link to comment Share on other sites More sharing options...
BruceCanfield Posted November 16, 2020 Share #3 Posted November 16, 2020 Didn't read close enough. An odd ball indeed. Almost certainly an experimental prototype. Link to comment Share on other sites More sharing options...
robinb Posted November 18, 2020 Author Share #4 Posted November 18, 2020 After doing some on line research I found that the shell in question is called a .60/.50. A war time experiment to develop a hyper velocity cartridge by necking down the .60 caliber shell and loading it with a .50 caliber bullet. The project failed by the way. Here's a different .60 head stamp just for fun. Link to comment Share on other sites More sharing options...
Scottz63 Posted November 18, 2020 Share #5 Posted November 18, 2020 Cool. I searched and could not find any info on the .60/.50 round. Where did you find info on it? Thanks, Scott Link to comment Share on other sites More sharing options...
Taber10 Posted November 18, 2020 Share #6 Posted November 18, 2020 OK, maybe the .60 and the necked down 60/50 "failed" but the basic cartridge--necked up to the 20mm gave rise to the 20mm Vulcan (20 X 102) or originally the "M50-series" of 20mm which is still heavily used around the world today. Link to comment Share on other sites More sharing options...
robinb Posted November 18, 2020 Author Share #7 Posted November 18, 2020 https://forum.cartridgecollectors.org/t/60-caliber-machine-gun-round/7036 Link to comment Share on other sites More sharing options...
silverplate Posted November 19, 2020 Share #8 Posted November 19, 2020 There is also a whole chapter devoted to the .60 caliber round in Volume 2 of "The History of Modern U.S. Military Small Arms Ammunition". An interesting read. Link to comment Share on other sites More sharing options...
robinb Posted November 19, 2020 Author Share #9 Posted November 19, 2020 Two more out of my collection. Got these 35 years ago from a WW2 vet whos father was working at Frankford Arsenal on the .60 cal project. They had been sitting on the fireplace for decades and he had no idea that they were both cigarette lighters until I pointed it out. He got a good laugh out of it. Link to comment Share on other sites More sharing options...
917601 Posted November 20, 2020 Share #10 Posted November 20, 2020 Thanks for showing, a rarity with provenance- priceless! Link to comment Share on other sites More sharing options...
Scottz63 Posted November 22, 2020 Share #11 Posted November 22, 2020 Very cool! Link to comment Share on other sites More sharing options...
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