LOL... Too funny.
OK - so if someone did make a bullet with a high BC in those calibers, the projectile would weight so much, you wouldn't want to shoot it. the velocity would be low.. And the drop would be nasty.
Consider to get decent BC's in a 30 cal, you need to. Use a ~209 grain bullet, by the time your at 338 it's at least 225 grains..
Spot
Yeah all that is completely true but I bet those big 375's pack some real ass at distance and it's fun to see some people step up outside the box and experiment with those big wildcats.
I have to stand back and admire at this point but I do get a kick out of Swampland's work with these big wildcat cases. Great stuff!
