G'Day Fella's,

Remington, I have owned a new Rem 700 in .338 Win Mag, since Remington first made the M700 in this chambering. I'm very happy with most aspects of this combination.
The .338 Win Mag is a great cartridge, and any factory ammo you can purchase, will be effective on any size Boar you can find, as long as you put the bullet in the chest cavity of the animal.

As to How Far you can shoot animals with it.
I always look at the fact that the difference in the Muzzle Velocity between the .338 Win Mag (@ 2700 fps), and the .338 Lapua Mag (@ 3000 fps) both with 250 grn bullets, is only 300 fps in my rifles.
So given this and the fact that some people shoot game animals at extreme distances with the Lapua Mag......., the Win Mag is only 300 fps behind the Lapua Mag.
Can I please suggest, that you do need to have a rifle that is capable of extremely good accuracy and also be capable of shooting extremely well your self, before you ever attempt shooting at any animal at long distance!

I have never fired factory ammo thru my various .338's (.338-06, .338 Win Mag, .340 Weatherby and .338 Lapua Mag), but only ever reloaded my own ammo for them.
In the case of the .338 Win Mag, I have only ever loaded up 200grn bullets at 3000 fps, and 250 grn at 2700fps.

Hope that helps

Doh!
Homer