Bob, the brass is easy to make and if you travel and have lost your ammo, you can use 7 Rem.. DO IT!

True story. I was out at the local range one day and there were some 20 somethings out there shooting also. I asked what the gun was and the fellow said that he had inherited it from his Gpaw. It was a 7 mm Mag. He commented that the fired brass looked a little funny. I examined the said brass. He was shooting 7 Rem in a 50's 60's custom Mashburn. Groups weren't bad and I didn't have the heart to explain to the kid. He was happy and wouldn't have understood what I was talking about anyway.