one benefit of the Lapua Imp over the Edge is the ability to shoot std Lapua ammo through it in a pinch. god forbid if you go on hunting trip and somehow either your ammo doesn't show up (airlines never loose bags right) or you have other ammo problems. most descent gun shops will have 338 Lapua ammo (or you could even overnight some from someplace like midway). it won't be cheap, but better than not being able to hunt.
I just started testing RL 33 with a standard edge, up to 106.5 grns in a new barrel, no sign of pressure, I'm getting 3005 fps ave with 300 grn bergers, .03 @ 100 yard. I'll be testing these loads with HBN soon.
Impressive velocity. Did you really mean .03" groups at 100 yards? I would preserve a barrel like that as long as possible. I suspect you meant 0.3". Which is still very good.