I have a brand new Browning Stainless Stalker in 280, not made anymore, and I have a Remington 700 stainless synthetic in 270 with about 50 rounds through it, which one should I keep?

I'm going back to Kansas this year and I take two rifles to use, one for hunting spots that offer 150 yard or less shots and I'll take my Remington 700 in 300 Ultra Mag, killed my 160 class buck with it last year, for the open range stuff because of the heavier bullet weight to help with the high wind in Kansas.

I don't want to get offered a shot and be under powered in Kansas, due to the wind, range or the size of the deer. I'm also a shoulder shooter for deer, I'd rather take out their wheels and heart, which I have seen to be a hot topic for debate, but I am not trying to start a flame war. I know I'm anal about rifle selection, but I haven't lost a deer and I don't want to start.

I need to sell one or the other to finance a new varmint rifle.

I haven't done anything with the Browning, but put it in my safe, carry it down to my dealer for him to sell and list it on the internet.

The Remington shoots well, has very low recoil, it packs nice and the ammo choices are great.

Does the 280 have any real world adavantages over the 270? Ammo availability, performance or KO power?

I am planning to elk hunt one of these days, when my schedule permits, and may even have to try Caribou or some Canadian deer hunting.

I think I can sell the Remington quicker than the Browning, I've had the Browning for sale since early January and have had no bites at all, I know it isn't the best time of year.

Any thoughts?