Johnb9: I hope your Sendero will shoot M.O.A. with factory ammo but I can't make that promise to you or even give you an experience based opinion.
I have a wonderfully accurate Remington Sendero in caliber 270 Winchester and it shoots 1/2 M.O.A. (with a Leupold 8.5x25 variable scope on it) using my carefully crafted handloads! These are 5 shot groups at 100 yards by the way.
All my friends with Sendero's in various calibers also use handloaded ammunition! And they all experience accuracy under 1 M.O.A. with their handloaded ammunition.
I agree with 30/378's posting in that your choice of the 7mm Remington Magnum Sendero is going to allow you to Hunt just about any type Big Game that may come along here in North America.
I have taken Blacktailed Deer, Mt. Goat, Mule Deer, Black Bear, Elk, Antelope, Whitetailed Deer and Coyotes with my various 7mm Remington Magnums!
I have friends who have taken Bighorn Sheep, Caribou and Moose with the 7mm Remington Magnum as well.
"IF", I had it to do over again I think I would also go with the 7mm Remington Magnum in the Sendero Model over the 270 Winchester Sendero I got several years ago.
I literally "stole" my Sendero from a non-Hunter who won the Rifle in a raffle type situation and wanted to sell it QUICKLY.
My main obstacle to recommending the Sendero in 7mm Remington Magnum with factory ammo as a 1 M.O.A. Rifle is - I am just NOT that familiar with factory ammo!
In the past 48 years I have owned and shot at least 200 Rifles (probably closer to 250!) and I have used factory ammo in only about 10 of them!
Two current exceptions are a Remington 700 SS/DBM in caliber 25/06 Remington. I use factory ammunition in this Rifle (Remington PSP's) and with a Leupold 4.5x14 scope it will group (5 shots at 100 yards) just under 1 M.O.A., consistently.
Nothing but a trigger job done to this sporter Remington weight Rifle by the way.
The other current exception is my brand new Spring Bear Hunting and dark timber Elk Hunting Rifle which is a Tikka in 338 Federal. It shoots factory Federal ammunition into groups (5 shots at 100 yards) right at 1 M.O.A.!
I have a "hunch" that with a 6x18 variable scope on the Sendero, and after trying several quality factory munitions in the Sendero that indeed you should reach or best 1 M.O.A. accuracy!
My Remington 700 Classic in 7mm Remington Magnum (with a Leupold 3.5x10 and handloads) year after year makes 3 shot sight-in verification groups between .5 M.O.A. and .6 M.O.A.!
I normally don't like to shoot 5 shot groups with my Magnums (flinch prevention program in use!) thus the 3 shotters my Magnum's.
I do know this, there is a very high resale value in used (but well cared for!) Remington Sendero's so if for some reason you don't like it the Rifle will resell easily.
Best of luck if you decide to try the Sendero.
Hold into the wind
VarmintGuy