When you say throat preservation, you speaking of the looks of it or have you measured throat erosion? I guess I've never read where a Weatherby case had great barrel life in general. Most chamberings go south after so much erosion and pressures cannot be maintained, and IMO Weatherby starts in negative in that aspect.
I have pulled barrels that have LOOKED great through a borescope, but seemingly were done. Right now I am shooting a Dasher that the first 4" of the barrel has looked like shit since the first 500 rds down it, still hammering at 1100 rds.
I chalk a lot of this up to barrel steel.
what brand?