I've been kicking around ideas of what cartridge to use for a new build to shoot the new 300 gr Berger. I like the .338 Norma but not a fan of the 20 deg shoulder. Has anyone thought about putting a 30-35 deg shoulder on it? What kind of improvement can I expect in terms of velocity or case capacity? Basically I want to push the 300 gr Berger around 2950-3000 fps. I know about the Edge, Lapua, Lapua Imp, RUM, and several others. If there are any other suggestions feel free to share.