Re: Lapua speed's
300wsmmad, I can not imagine any 338-300 ultramag, or edge as you call it, getting 3300 fps with a 250 grain bullet. That chrono needs to be checked. There are few people around who have the experience with that cartridge as I do and I have chronographed over a hundred of them. None of them would ever even aproach that kind of velocity safely. 3300 fps with a 250 grain bullet is getting into 338-378 weatherby velocities and the 378 case is way more rifle than anything off the ultramag case.
Again, to answer the question, the 338 Lapua will top out between 2800 and 2900 fps with a 300 grain bullet in a 30" barrel. Which is the same as the 338-300 ultramag, or edge, and 338 ultramag. Some rifles shoot much better in the 2700's and get erratic in the 2800's. Just depends on the rifle. For comparison the 338-378 Weatherby seems to like 2975-3025 fps for best accuracy. Like I said"top out", not necessarily where it will shoot the best.
Predictions are difficult, especially when they involve the future