JusticeTrimble,
I bought mine used also. It came with three sets of barrels a set of 470, 9.3x73R and 7X65R. All three sets have 1.5-6 Ziess Diavari scopes, 2 have claw mounts and one has a pivot mount. I had it restocked left handed.
I have tried all available ammo in 285 and 286 grain. They all shot fine. The S&B shot well as did the Norma and RWS.
I liked the Nosler best. I got a box of A Squared and will soon try Hornady's. But the gun 9.3x74R doesn't seem finicky about ammo at all. The 7x65R was another story it likes one ammo and thats it. The 470 is fine with standard Federal Ammo.
I'm still toying with getting a set of shotgun barrels fitted for it.
Last my gun came in a hard sided Americase for all the toys to be together in.