My son shoots my Grandfather's Sako 270 and I have a 270 WSM. I had the original 264 win mag back in my earlier years but as expected, shot the barrel out of it and replaced it with a cheap Tikka T3 270 wsm. Got it for $599 about a decade ago. Between my Grandpa, son and myself we've killed over 100 deer and 24 elk with a .277 caliber. Typically, with the 140 grain Accubond and 150 grain Partition. It just kills. Not sure if there is any mystique or magic to it but we've never had an animal get away. I shot the barrel out of the Tikka and replaced it with a 1:8 twist barrel. Oh ---- if it didn't turn this rifle into a beast! With the 156 Hammer Hunter bullets and 170 Berger's it will shoot under MOA out to 1200 yds and is an extremely effective killer on mule deer, elk, pigs, antelope and bear. I rarely carry anything else anymore. And that poor old Model 70 264 just sits in the back of the safe gathering dust. I will rebarrel it someday, but for a hunter that doesn't shoot live animals over 600 yds I really don't need it. I have a 280 AI I really like with the 168 ABLR but it's a 10 lb rifle so it has it's limitations or maybe my aging legs do carrying it at high elevations. I think you will be pleasantly surprised with that 270 AI and hope you have as much luck and fun as my family has shooting the 270's over the years. Enjoy your build!