I shoot two loads from my 338-06 at just over 2800 with 210gr partitions. Both have been shoot thru a chrono and are just short of max loads. I get almost no usefull difference in velocity when loading a 200gr BT. The difference in recoil between a 338mag and 338-06 is significant, at least in the rifles that I' ve shot.
I agree that the economic numbers will probably never add up to make this a widely available round which is a shame. Most of the cartridges on the market today are " not needed" but wouldn' t that make things very boring? Everyone has at least one round that they either love or hate, which is why hunting and shooting is so much fun