It looks Like Norma imported new 358 Norma mag ammo, it's been awhile since I've seen factory ammo available thought I'd give all the 358 Norma fans a heads up.

Midway has it. 250gr at 2756 fps muzzle speed -

https://www.midwayusa.com/358-...-magnum/br?cid=10602

https://www.norma-ammunition.c...um/NormaOryx-250-gr/

Although DoubleTap has been offering it. 250gr A-Frame at 2800 fps muzzle speed plus other offerings -

http://www.doubletapammo.net/i...3_333&product_id=241

Incidentally, comparable muzzle speeds with my .350 RM (long action 24" 1:12 barrel) -