OJP....Österreichische Jagdpatronenfabrik, Kramsach, Tirol, Austria
IV.... Hirtenberger case and priming
61....production year 1961
Supposedly non-corrosive, 150gr. Lead core, open flat base, copper washed gilding metal jacketed bullet, pointed, No canular, sealed bullet and primer.
Some say it is loaded with stick powder and if so, should be Berdan primed and corrosive, yet some sources indicate stick or flake powder and Boxer prime and non-corrosive.
Guess you'll have to yank a bullet and see!
No collector value reported, rumored to be loaded for machine guns and is loaded very 'hot', this is the rumor, I do not have any information to support this claim either way.