Wait till you need to buy ammo.
I can't imagine anyone with a 7x61 not loading their own. New Norma brass has not been hard to find. It can be formed from 7mm Remington Magnum and other brass, but I've never seen a need to do that. As for loaded ammo, however, it hasn't been available for a long time. A Norma rep told me several years ago that if a demand for factory ammo should ever occur (I doubt that), it would be very easy for them to manufacture it again.
