I just bought a Kimber Montana 8400 WSM to build a 6.5 PRC. I hadn't planned to push the weight that low but it might be fun to try. We're working on some new lightweight bottom metal and this one is to fill that role.
Here is a writeup on a lightweight build compared to stock. Might be some good information in there.
Kimber Rifles - Lightweight Hunting Rifles
Kimber Rifles - A Lightweight Hunting Rifle Showdown Lightweight rifles are nothing new, especially to Kimber America, but the new Mountain Ascent rifle has been turning some heads. Let's take a peek at how a brand new Mountain Ascent stacks up against a modified 84M Montana to see which one of...www.thealaskalife.com
FWIW I think the 8400 WSM is about 8oz heavier than the 84m. I'm very fond of my 84m 6.5CM. Not sure if I want or need the larger 6.5 PRC. We'll see how this one turns out.
There's good advice on pulling weight from other places/gear. Probably a lot more oz per dollar to be had in other places. Also, I worry about what cost some of those last oz bring.
My experience. 6.5mm Rock Creek #2 contour 8 twist, 24". Measures .575" at the muzzle. Rebedded the barreled action. Didn't do anything to try to lighten it up from factory, triggerguard is metal, etc…. 8 lbs 0 oz with S&B PMII 10x42 in Talley LW lows, and 3 rounds.