I didn't know that Weatherby had a 154gr Nosler Part load. I thought that the Nosler entrys were 150gr and 160 gr. I think that weatherby factory ammo used to be loaded with Hornady Spire Points tho, maybe they still are? That would account for the 154gr 7mm bullet. If all this is true, then you've had good success with cup and core bullets in the 7mm Weatherby. Not bad!