[Greysard]

I assume I’ll have to have the ammo sent to a gun dealer?

Not in CA, at least. However, unrelated to that, be aware that most military surplus ammo is corrosive.

[Lurkinanloomin]

Yep, very important point. Rifle must be thoroughly cleaned ASAP after using corrosive surplus. It’s fine to shoot and if you clean it correctly it will not damage the gun.