.....in .270, blued, wood stock. My only issues are the fact the stock is a little short for me (I'm over 6 ft, 225 lbs), and the out of the box accuracy was a little squirrely for what I am used to. 130 grainers would not shoot very well, keeping most 5 shot groups (after a fouling shot or two) with Nosler Ballistic Tips and Hornaday SSTs averaging 1.75 or so at 100. Any more than that the groups really opened up. 150 grainers of the same persuasion were a little better. Had the gun pillar bedded, barrel floated, and set the trigger to about 3 pounds: 130s are still kinda squirrelly, but the 150s are nice! 150 Noslers with H4831 are shooting 4 shot groups under an inch no sweat......#5 opens up to an inch or so, any other shots (say up to total of 10) 1 minute between them open it up to 1.5".
Recoil is a piece of cake! Sure, it barks with hot loaded 150s, but its nothing to worry about. I know zip about the .260 so cannot comment. I have used a .270 in one gun or another for years like a lot of guys have, and the only drawback is you can't go to heavier bullets, like the .30-06 can. Kills deer, lots of fun loaded with 100 grainers for jack rabbits and coyotes, and obviously can do an elk if needed.
One piece of advice: stay the hell away (if possible) from that stupid cheesy detachable magazine! I haven't followed what is and isn't available in the mtn rifle lately, but this POS system can be a problem. If the mag is out of tolerance, or the fit to the action isn't right, the bolt can miss picking up the next shell in the mag. The spring pressure pushes the bases of the shells down against the mag, the mag gets pushed away from the action, thus in some cases leaving the bolt nothing to pick up when cycled. The latches are on the side of the mag and mag box and unfortunately act as a fulcrum to the spring presssure in the mag, which pushes the mag away from the gun. Rarely happens to the Mtn Rifle I have. Does happen ALL THE TIME with another Model 700 I have.
Good luck!
RR