I own 2 of the 8400's, one classic in a 300 WSM
, and a montana in a 325 WSM. Both shoot about 3/4 MOA with full velocity loads, although one did take a little work I am happy with these 2 factory rifles. I have 2 friends that have the 300WSM in the classic's and one shoots about like mine and the other not so well, but he hasn't worked with it as much as I would of.
Recoil is not bad at all with the 300 and 180gr bullets, the 325 is a little stout with the 200 gr but is very manageable.
My montana weights under 7lbs with 2.5-8x36 vari-x 3 and full magazine and is a real pleasure to pack into the backcoutry. You can carry these kimbers in rough elk country for a week and it doesn't wear you down like a heavier rifle does. If one wasn't into spending a ton of money on a custom lightweight mountain rifle the kimber 8400 would be my pick for sure.
By the way the montana is for sale on the "gun for sale" page.