A "6mm int'l" may not be a 6mm-250 Savage! Caution is suggested until your certain what the chamber is.

For instance I have shot a 6mm Remington International since 1966 and the shoulder is pushed back quite far on the 250 Savage case. The load above using IMR 3031 would be an overload for the 70 gr bullet in my rifle.

http://www.reloadbench.com/cartridges/w6mm250.html

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All guns should be locked up when not in use!