Re: .338 EDGE Newbie
As far as getting it throated for the 300 grainers, NO. you dont need to have it throated for 300 grain bullets, but if you do they will probably shoot better than any other bullet out of that rifle. I shoot a .338 RUM (ballistic twin to the EDGE) I run 300 grain, 250grain, 225 and 210 grian bullets and all work well.
Barrel contour is something that you gotta decide for yourself. I have no problem packing a 13lbs rifle in rough country, but opt not to for balance reasons (offhand shots are as common as LR shots). I like medium palma best as long as the rifle doesnt have a really light stock.
You dont need a sako extractor. The EDGE is based off the RUM parent case and that case was built around the M700 action. Sako extractors are nice, but not needed.
you can have a brake turned down to any diameter as long as ther's enough barrel wall thickness (only a worry with ultralights I would think).