With him being a reloader adds more uncertainty to any ammo you have possession of.
It is highly recomended that any reloads should not be fired by anyone other than the one who reloaded the ammo and then only in the firearm it was loaded for. Sure some do not follow those reccomendations and that is just the nature of people.
All said ammo should be dis-assembled for the components only. Even the Weatherby unless it is very evident that it wasn't reloaded.
There is no intention of any kind questioning his skills or judgments.