What would you do? Building a backpacking hunting rifle/general long range...
Prior to a couple of years ago, I was in the camp that favored the slightly heavier rifle even though it was a little more of a burden trying to negotiate the mountainous areas of the Southwest. But the last few years have brought some excellent, lighter weight components onto the firearms market so I'm beginning to modify how I build for some of the folks who want or need less of a burden while still climbing up and down the more difficult terrain.
Tom Manners has contributed significantly with his lightweight but stiff carbon fiber stocks. Your suggested EH1A is the adjustable variation of the stock I end up using most frequently, the EH1. I've also spent quite a bit of time working with the Proof Research barrels for both bolt rifles and the AR platforms. My only hesitation here is the fact that I have had such excellent results from the Bartlein barrels in every caliber and cartridge that I've used in any build. So rather than attempt to use just the carbon fiber or fluting to save a little bit of weight, I've started using some of the smaller contours and shortening the barrel length a little. I don't go smaller than their #3 contour but the weight savings when compared to my once normal #10 light Palma or a modified #13 in a 26" finished length.
Now I'm concentrating on the #3 Bartlein at 24" finished plus a brake if requested. Sometimes I'll dip below 24" down to 22" if I can justify the cartridge/bullet combination in a shorter barrel. I've gone as short as 18" when chambering for a .308 Win. The EH1 stocks are configured for ADL, to eliminate bottom metal. I do splurge a little by including several flush cups to allow for a variety of carry positions.
I'm not yet convinced to convert over to Titanium actions but the new Bordon and Pierce action are having a definite affect on my thinking.
My personal experiment involves a larger than standard cartridge, the 7mm-300 Norma Magnum so this won't be the ultimate in light weight, although it is significantly lighter than what I normally carry:
EH1 ADL stock
Borden Titanium action
Bartlein 7mm #3 5R SS 28" finished
Trigger Tech trigger
Talley Alloy mounts
Swarovski Optik Z5 3.5-18X44 (BRX reticle)
It looks like right around 8 lbs. finished. It beats the daylights out the 12-14 lbs. I've been carrying...
Enjoy the process!