I'm looking to buy an all around gun that can hunt game from deer to bears in Canada. I'm only looking to own one great rifle! I'm looking at and like the Remington modle 700 in either the :
Sendero sf ii in 300 ultra mag
Long range tactical in 300 win mag
Please comment and take into account I want to be able to kill something long range if needed 600 + yards! Voice ur oppionion thanks
Either one will serve you well. I had 2 Win mags and sold both. Now I own a 300 RUM and haven't looked back. My advise is to pick up some Nosler brass if you can though. Remington works and is OK but it is my opinion it needs extra case prep to take full advantage.
I was fortunate to buy a lot of virgin primed Federal cases when they were available.
If you really want one between the 2, I'd say, go RUM and use a larger bullet: 210 Berger VLD, or 200 Accubond, or even a TTSX or similar.
I'm going to go the other direction. If you want longevity out of the barrel, I would say 300WM. You will get more rounds down range with the WM than the RUM. I do agree that you should use the 210 Berger in either caliber. That is what I am using right now in my 300WSM.
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it.  But small is the gate and narrow the road that leads to life, and only a few find it.
If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger
Friends don't let friends develop canonitis!-chucknbach
arguing over the internet is like the special Olympics....even if you win, you are still...special!
I'm with liltank on this one!! I love to shoot a lot and a 300RUM wouldn't last a year for me. One great rifle is hard to get of the self sometimes, I would lean to the Sendero as your best chances and go with the 300 win since Rem don't seem to like short action stuff.
High Fence, Low Fence, Stuck in the Fence, if I can Tag it and Eat it, it's Hunting!
"Pain is weakness leaving your body"
I like all the options here. The 7mm rem mag is a beautiful round and would work for the ranges your taking about. Would be my preferred choice for the whitetail. I also love the 300. wsm and wouldn't hesitate to get one of them. Oh wait i have one Take a strong look at the 300. wsm