Jordan,
There are a couple problems with using the 115 VLD in the .257 Weatherby. The lesser problem is that muzzle velocities are over the 3200 fps Berger recommends as maximum--especially with longer-barreled rifles with handloads that are "leaned on." They might even come apart in the air.
The other problem, which I've encountered in various Weatherby rounds, is the "freebore" (long throat) doesn't seem to help VLD accuracy.
