Got a question for the experts. I am going to do a competition ( some may have heard of it ) where physical endurance and accuracy are both tested. Targets will be from 500-1200 yards. Due to the need to run 7 miles with my rifle, the Winchester Laredo LRH 300WM that I have set up for long range is out of the question due to weight. I have the following three choices in my safe: Remington VTR in .308 with factory plastic stock and 22 in barrel, Winchester Extreme Sporter in .270 WSM with 24 in barrel and factory full aluminum block stock, and Browning Abolt stainless stalker BOSS in 300WM with factory plastic stock and effective 24 in barrel. Given these choices, which would you start with to work up a load for 1000 yards? I really like the 270 WSM caliber and am inclined to start there with the 150 grain bergers, but would love to hear some opinions, pros and cons. Scope will be a Vortex Viper 6-24x50 MD.