I have had a bit of experience with lead core bullets in 416 Barrett.
I found that you cannot push them as hard as solid turned bullets.
I can get 3200 + with turned bullets, 3000 reliably tops out jacketed ones in my rifle.
I was experiencing the same sort of trouble that Berger encountered with the Gen 1 at around the same time.
So I think the weight, length & jacket thickness will be critical to obtain a good launch speed.
Also the twist required to spin up the higher BC bullets will be very hard on the jackets especially if launched hard by the bigger chamberings.
I'm in the process of building a couple of 375s big & small so a bullet that does fly will interest me