CplA...There’s more to it than just Muzzle Velocity at the start... 7WSM, 28Nosler, 7Mag all using skinny projectiles behind good powder will slide through the air maintaining velocity while a 300 RUM with poor BC bullets start to drag and lose velocity.
And, I own and love my 300 ultra mag. Have hunted it for many years. Owned a 30-378 Roy for several years too. Killed a lot with both. But, I can’t change physics when it comes to ballistical coefficient bullets that aren’t there for the 30 cal, yet.
I just placed an order for a custom build 7WSM with a respected gun builder after seeing what my pards 28N was doing on steel at 750 yards compared to the splash from my 300 Roy shooting 180g NAB’s. Proof was before my eyes...😎
