I want to build a ultra-long range hunting rifle in 338. It will be built on a Remington 700 action and be pushing 300 gr. SMK's until Berger releases theirs. What are the performance differences between the two and could i go even bigger with the 700 action? Pretty sure I'm limited in size with the 700 action. Is all the extra work worth it with the Edge in terms of forming brass, etc, when compard to the 338 RUM? For the barrel, I'm looking at a 1.250 taper to .900 at the muzzle, unless you think i could go thinner and still maintain accuracy. What about length? Kind of settled on 32", finished. Any real velocity gain with a 34"? Any suggestions will be greatly appreciated.