Well certainly the Rum wont do any better if loaded to the same pressure as the 7 rem mag.
Your figures show that there is no advantage to the 190 other than a little more energy which isn't really a factor.
You can choose to use published data if you like. But if you talk with people who have actually sat behind these things
and watch them fly over long distances, you will get a different opinion.
Its not a question of being biased one way or another, its simply a fact, and seeing is believing the facts.
You have the same situation regardless of the cartridge you select. Wether its a 7mm, a 30 cal, or even a 338.
There will be an optimum bullet weight for that particular cartridge, (based on the velocity), and not just the BC number.
BC numbers now sells bullets the same as sex sells magazines. Velocity will trump BC to a point, and when you reach that point, stuff in more powder, or get a bigger gun.
Ive frankly never had a magnum cartridge on a Savage action.
If it were me today, and not yesterday, id opt for a 280 AI and then go to at least a 30 cal on a custom action if your looking for max performance.