If you do much hunting in higher elevation for goats, sheep, etc, what is your rifle setup like? I've done a little bit of this hunting but want to do more before the mountains get too steep! I've owned Gunwerks and various carbon barreled guns but have never built one purposely for mountain hunts.
It all depends on your definition on mountain hunting. For me, it could be a mixed species hunt in BC where you might have a big black bear or moose opportunity while glassing for goats. That's a wide range of target weights and sizes and goats are notoriously tough to begin with. For that reason, I'm thinking bigger than my lightweight 6.5 PRC. That's a little lighter bullet than I would prefer for moose. Yes, you can kill moose with little bullets but you might only get an angle that needs as much bullet as you can put on it.
So I have a Christensen Arms 6.5 PRC that is light and accurate but again, the bullet weight is a little marginal for larger animals. I have a Gunwerks 300 PRC Nexus but the weight is 9.5# scoped. That's a little heavy for busting through nasty alders, etc. I'm thinking of something lighter in that 7mm to .300 caliber range and in a 20-22" barrel.
What are you using or what would you build for this application?
I live and hunt at some elevation: my village is at 1175 m a.s.l. and chamois seldom come lower than 1500 m. However, while we haven't moose neither elk, bears are strictly protected, as well as wolves.
It sound (and it is) absurd but the laws are clear and strict.
Anyway, my "mountain gun" (actually, ages ago, I was a 2nd Lt. in mountain artillery) is a Weatherby Vanguard Sub Moa in 7 mm Rem. Mag. It is more accurate than declared by Weatherby (3 shots in 22-40 mm at 200 m) and, thanks to muzzle brake and recoil pad doesn't kick. The heaviest bullet I used was a Barnes LRX 145 grs.
The scope is a Zeiss Conquest 4,5-14 x 44.
Before the arrival of recent accurate ammo like the 6 mm Creedmore (to mention one), chamois hunter in this area used flat shooting cartridges like mine, and:
-6,5x68 now almost abandoned because the long cartridge involves an extra long action, either specially made (very expensive) or obtained after receiver "surgery and welding" of a surplus Mauser 98; sometimes the operation was successful, sometimes not so much;
-.270 Wby and other Weatherby calibers (no, not the .460)
-the 300s (Winchester, Weatherby, H&H)
-the 7mm STW
-the 22-250, provided that the weather isn't (better, wasn't) too windy
-.25-06 not very very common, however 3 hunters upon 25 in my village hunt with it.
Our New Zealand colleagues, having chamois, tahr (heavier) and elk on their mountains could be a useful source of info.