Just picked up my new 280 AI Kimber Mountain Ascent Mojave. All I can say is it is nice. Comes with a nice soft case and a sling. The stock is a step above my older Ascent, but it's good also.
Based upon looks, I wasn't impressed with the new H-S stock equipped Kimbers. Then I held it. It's a better stock design than the older Montana stock. I'll weigh one this morning if I remember.
I shoot 165's and 150 280 AI recoil is minimal. Not that I have seen. This is about average for the older one, have not had time to ring out the new one. I'll do a 10 shot test when I get time.
A 6-pound rifle with 7mm Rem. Mag. ballistics will recoil. That's unavoidable. I killed my mountain goat with a .280 Acklety 84L Mountain Ascent, and it wasn't a fun gun to shoot. Lightweight rifles are best paired with low recoil cartridges. The upper limit for me is the 6mm Creedmoor/.243 Win. type rounds. With 16-inch barrels and suppressors, they are a joy to shoot and kill as well as the big stuff.