I'm shooting 1950s era 30.06 in my US military guns, Lake City, never a problem, 1930 era Turkish 8mm in my 98&98K, very accurate,1960 era Finnish 9mm in my Luger & P38, no problems, and 1950s era .303 in the British guns. Long as its clean it works well. Just have to repeatedly clean the guns afterward.
RK
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