Concerning the R8 I forgot about to tell you that you might order the Atzl Match trigger assembly. 250g for shooting competition and 800g for hunting. A useful extra and much better than the factory trigger.
BTW, why aren't you thinking about giving an order for the 8x68S calibre. Same flat trajectory as the 300WM but increased terminal performance and last but not least beltless!
A good muzzle - brake is a must for both of the calibres. Do not use the so called Dualbrake from Blaser itself. It's 3 times the price (almost 400 Euros!!) of the others and surely not better. If you want to try a European mark, so take a close look at the Hdp - brake from Lutz Moeller, if not take one of the well-known American.
BTW, unfortunately we don't have any elk (wapiti) in Europe. You surely meant moose (dette betyr elg på engelsk).