I am leaving by way of Dallas to go to Saskatchewan for big whitetail in one week. My question is, do I take the old Mark V in 270 Win with the Zeis 3-9X50 or the 260 Rem AI that I worked up the hunting loads for with the Hornady 140 gr SST's. The 260 out performs the 270 and I have a 4-16X50 Viper PST on it. The variables are the Mark V is much lighter to get to the stand and to hold in the stand, but I would not feel comfortable shooting it past 350 yards with only a duplex scope. The 260 has been verified and shot our to 794 yards. The outfitter delivers us to the stands in the morning and picks us up in the evenings. We are to have rests if we are in blinds or a bar around a ladder stand if we are in those and I use a shooting stick for more stability then too. One last variable is low light visibility. I believe it would be a little better with the Zeis. And I also do not know that I would ever have any kind of a long shot available. Anyone hunt in the transitional terrain up there and have any recommendations?