.308 can easily do 1000m shooting. Sure there are better calibers out there, but to say it's not a 1000m caliber is flat out incorrect.
From what I can see, nobody in this thread said that .308WIN in not a 1000m calibre (which I would take to mean "capable of hitting targets at 1000m"), and if they did, yeah, they would be incorrect.
What I said was:
Do you mean shoot for groups, competitively at 1000m? I don't think either one of these is the rifle, or really even the cartridge, for that. A KM is a long damn way to shoot, especially with a .308. Sure, all kinds of people do it, but if you are really planning to do a lot of shooting at a KM, I would probably do more research than starting with two older Steyr products.
[With empahsis]
Subject to an infinite number of variables, a 168gr. match bullet shot from a .308WIN will drop more than 40MOA at 1000 yards. The same bullet will drop about 30MOA, or 25% less, in a .300WinMag. The cost difference of starting with .300WinMag rather than .308WIN will be small. The cost of starting over with a different calibre will be more significant. That alone is the kind of thing the OP obviously isn't thinking about.
With respect to the OP, he is obviously a total newb that hasn't thought through any of these issues, and pretty much just likes the look of the Steyrs (and the HK's and the AI's, apparently), and picked the number 1000m out of the air to try and sound like he was planning to do some serious shooting, and that is fine. But as I said in my post:
...if you are really planning to do a lot of shooting at a KM, I would probably do more research than starting with two older Steyr products.
IMHO, calibre should be at the top of the list of things to research, not looks. That is all I'm suggesting.
There is a reason I have $30,000 worth of .308WIN rifles in that picture. It's a great all-around cartridge. But would I recommend it for people who plan to (as I asked) "shoot for groups, competitively at 1000m?", no I wouldn't.
I'm all for learning to shoot with iron sights, it's how I started. That said, with today's optics, rifles, ammunition and all we know about ballistics a first round hit on a Fig14 at 600 yds becomes a routine event.
Yah, but as my AW buddy, I'm sure we can agree... routine hits at 600m with a great rifle and great (modern-style) optics on a Fig14 is routine.... but with iron sights... all kinds of frustration and wasted ammo down range.
At 1000 yards with iron sights... these days you're probably making a video and putting it on Youtube to show kids that it can actually be done (with a Mosin, Enfield, .308WIN, etc.). I don't care what anybody claims they can do on the Internet. That kind of shooting is REALLY, REALLY HARD, and far beyond the obvious newb tendencies of the OP.
Of course it
can be done. It's just hard, and frustrating way to learn anything about shooting. Even some of these Youtube guys, with a tuned trigger Mosin, custom front sight, 20, 30, 40 years of shooting experience, dead-steady off a bench, and even they can barely touch the gong one out of 5 shots at 1000 yards. Everybody says (on the internet) that they can do it, but the rubber really hits the road out there when the camera is rolling.
I would probably say, get a 308WIN but forget the 1000m idea. Start at 100m, then 200m, 300m, 600m or whatever. If you can't shoot sub-MOA at 100m, you aren't likely to do any better further out.