As per always,bullets matter wayyyyyyyy the fhuqk more than headstamps. Hint. Congratulations?!?
The 250gr .338" will grant a .685 BC,which very much pales to .30cal 225gr .777 BC or 230gr .823 BC...or the 250gr .878 BC. Hint.
No need to stretch a throat,though it's a common misconception. (3) different projectiles,to a like Smooch,in the same rifle...though yielding grossly different COAL. Hint.
Pass the 7mm's and hold the Fluff. Hint.
Bless your hearts for trying though.
Hint.
LAUGHING!.................