As for what it's not big enough for.... it's a short list. Big brown bears, bison, and possibly moose. I've heard of a lot of people using them for elk, so there's not a lot you can't hunt with it in NA. Good choice of cartridge.
I've used a 270 most of my life with exception of a magnum chambered weatherby for the Wilds of Montana. It is a great all around cartridge. Your going to run into very few animals you can take with one.
The previous list of manufactures is a good one. Might want to look at the Ruger M77 LH
Look at Savage rifles. I've found all of mine to be very accurate. 270 is great for deer sized critters, a tad overkill on vermin. With proper bullet selection, bigger critters could be taken as well (e.g. elk, black bear).