The 8x56r uses a .330" or .329" bullet. Nobody makes a jacketed bullet of that diameter. mbogo3's cast bullet mold will fix that. Slug the barrel first.
What make is the brass? Boxer or berdan primed? If it's berdan, you're SOL. Shooter's Choice lists Bertram boxer primed brass at $54.95 per 20, if it comes to that.
Did you ask Epps if they'll be getting any ammo? About dies and bullets? Hornady isn't listing either diameter bullet.