Wolfdog91
$330 for that M98 is an excellent price given it's already D&T'd, bolt hand forged or replaced and a scope safety installed. BTW, the rear Weaver base is not the correct one for a military M98. It's probably the one for an FN or other commercial action w/o the stripper clip guides. It can be easily modified to fit level by grinding or filing so it clears the stripper clip guide.
The 8x57 is an excellent cartridge, as mentioned, for cast bullets. I favor the Lyman 323471 for best accuracy and long range work as it has one of the best BCs for a cast bullet. The long Loverin design also fits the long throats of most milsurp barrels. The Lyman 323470 is also an excellent choice. I have a 195 gr GB Lee 6 cavity mould and a 150 gr PB bullet that also are excellent performers. Most milsurp 8x57 M98s with very good to excellent bores have grooves that are .005"+ deep which is excellent for cast bullets.
The 8x57 is also an excellent jacketed bullet cartridge when loaded to its European CIP potential as also mentioned. Loaing to that potential puts it on par with the 308W, 30-06 or similar cartridges.