It Can be reloaded, But it is expensive!!
The bullet diameter is 329 and they are
only available as custom made!
I have only seen 2 companies that make them.
Since all factory ammo for it is Berdan primed,
easily Reloadable brass is a pain in the butt.
It can be formed from 7.62x53(54) Russian Rimmed
brass, but there are several steps involved.

p.s.
I think that Old Western Scrounger loads
hunting rounds in this caliber

 

8x56R reloading

You can use 45-70 brass if you have a lathe to do some machining. Grafs is bring in some boxer primed brass. Lee has a cast bullet mould. I have a saeco mould that drops at .335 that I resize the bullets to .331-.332. There are some Lyman 338 moulds that if you find one you can resize to ..330-.332. It's easy to make nice mild loads with cast bullets.