Try an 8x57. 323 is pretty close to 358, when push comes to shove. Or the 8x63 the scandihoovians used for thier machine gun crews (same ammo in rifles and machine guns, basically an 8mm-06). The 8mm-06 is also a good choice (the AI version is even better), and easy to do on a surplus bubba 8x57. FWIW - dan