My first guess was probably highly optimistic. Here are the numbers I'm pretty confident in: 6.5-284 1200, 6BR 2200, 308 4000. These come from the competitive shooters. They are the ones that shoot enough to have shot out many barrels AND have a very good handle on accuracy. They do tend to shoot pretty fast at times and they need the very best accuracy to stay in the game. With hunting accuracy the numbers would be higher, for some people at least.
Seems like there are estimates of 1200-1500 for the 338 Edge. But again there isn't nearly the data there is for the three above. I'd think the 408 CT would be in the same ball park as the Edge. But now I'm back to guessing.
Good, someone who's not guessing. That's why people are drawn to the larger bore sizes for long range. To me 2000 to 3000 is pretty darn good for all that much performance!! I'm most interested in the 375 and would be happy with 2000.