Well, lets see if I can bring us back on track. If choosing the ultimate Yukon rifle was only a matter of choosing a flat shooting medium bore cartridge, we could simply nominate the .338 Lapua and move onto other matters; but there's more to it than that. The rifle must be light and portable enough that you can resist the temptation of leaving it where you lie gasping for breath high above the tree line, and carry on with only your belt knife. This is not the environment where you heart's desire is a 12 pound rifle topped with a 5.5-25X Nightforce in tactical double steel rings, and a magazine full of quarter pound cartridges. If you're a visiting flat-lander, rather than a local whose acclimatized to the thin warm air, its worse. Now if you happen to be a visiting flat-lander whose feeling his age, lives at sea level, and is used to the thick cold air at a high latitude, you're stuck with the rifle, (you've already thrown the belt knife, and most of your other gear off a cliff) so it better be light. I had the pleasure of using Douglas' M-7 KS in .350 magnum a while back, and immediately appreciated its 6 pound weight and handy dimensions. As soon as we got home we booked another trip, this time for a week at a cabin above the tree line on an alpine lake, and I began my search for a rifle that I could manage for the adventure. It just might be the ultimate Yukon rifle.
I began with the premise of a short action bolt gun, and despite my preference for CRF actions, decided a Remington 700 could be made a bit lighter. I contacted a gunsmith, and asked if he was interested in the project I had in mind. When he suggested that he thought that a long action could still make weight, I didn't hesitate, it would be a long action. I wanted a larger bore than a .35, preferring a 9.3 or a .375, and this bore size in a light contour barrel will make it lighter yet. I thought long and hard about a .375-284, but now that I had the long action, I immediately decided on the 9.3X62. That was the first hiccup, because my barrel maker of choice didn't make a .366 barrel, so the next best thing, and arguably a slightly better choice, is the .375 Scovile, which is a 9.3X62 opened up to .375. I worked with the 9.3 enough to have a pretty good idea of what I could get out of it, and in any bullet weight, the .375 should be a hair faster The barrel will be stainless #3 contour finished at 22" so it would balance slightly muzzle heavy. The muzzle is adorned with a NECG barrel band sight with the brass faced rectangular post insert, and there will be a ghost ring mounted on the rear of the scope base. The barrel and action will be bedded in a Wildcat Composites Ultralight 17 oz Kevlar stock, with a 13.5" LOP with the Decelerator recoil pad. The factory bottom metal is already light, so there's no need for an upgrade there. Thus the weight should end up about 6.5 pounds, and the cartridge has enough authority to easily surpass the legal requirement for bison. But that's not the whole story, and not why this might be the ultimate Yukon rifle. This rifle is a switch barrel, and one of the other barrels is a 24" .280 Ackley. The .280 provides a laser flat trajectory for the occasional long shot on sheep or other mountain game, and the world is full of slippery 7mm big game bullets.
So we've addressed the rifle weight and handling, and the cartridge power, and trajectory. A 1.75-6X Leupold in QD rings will be suitable with either barrel. The versatility that is realized by these two cartridges combined with a compact, light weight, quick handling package makes this the ultimate Yukon rifle. Is it better combination than a .340 Weatherby? Well, the terminal performance of the .375 matches that of the .340 on close range heavy game despite the apparent disparity in velocity, which might well work to the .375's advantage as bullets with lower impact velocities tend to penetrate deeper, and you don't damage tissue you don't reach. The .280 shoots just as flat, as the .340 without kicking you off the pinnacle of some rocky crag. But more importantly this rifle is lighter and handier, and when I'm struggling up those steep grades, its the rifle I'd sooner carry.