Weatherby doesn't make their own ammo. All Weatherby brass and loaded ammunition comes from Norma.Perhaps something in the Weatherby calibers...
A manufacture that doesn't cancel its cartridge making or limit there making of. At company whim. Frankly I can't say the same for Remington or Winchester.
I think, just like many other cartridges and general ammunition availability, that may be highly regional.You have to admit no Weatherby rifle owner has had to deal with a discontinuance or shortage of any Weatherby brand & labeled ammunition as of these last few years.