Built this on with the following specs, all DIY
Defiance Ruckus GA Hunter
Proof Carbon Sendero 22"
7mm PRC
Trigger Tech
McMillan Game Hunter
ARC Rings
Leupold 5HD
Hawkins M5 DBM
The 300 WSM is solid but I'd go no less than a 22" barrel. Since you have a 300 WM, I'd go with a 7mm PRC, hard to beat and versatile.
If you are planning to go with a Manners stock, it will be next year before you see it. McMillan is about 60 days out from order date.
You can go the DIY...
I've been buying the Harvester EVO suppressor for around $550, it's 10.8 oz, 6.23" long. Not full-auto rated but that's fine for a hunting rifle. However, it has since been discontinued and I'm looking for something similar in the same $/weight/length range. Recommendations appreciated, thanks!
Used Proof barrel, less than 45 rounds (still have the ammo boxes), shot .244" with Berger Hybrid Target ammo. Barrel in perfect shape, no defects, just decided I needed another 308. $979 at Midway, asking $695
I used my 7 PRC for the first time this year, shot a doe at 115 yards, bullet (175 ELDX) performed as expected. I really like the PRC but mostly think it's overkill for most deer at under 200 yards. The 7mm RM is a better fit with bullets in the 140-160 range. The PRC shines in open country...
I've got the Game Scout (similar to the GW) on a Win 70 and I like it. Having gone to a vertical grip on most of my rifles, the rifles with what I call traditional/open-grip, feel odd these days. I compare them to shotgun grips, good for instinctive pointing and fast shooting but not so great...
I just recently got mine assembled, DIY pre-fit.
Defiance Ruckus GA Hunter
Proof carbon @ 22" (compromise for suppresser)
McMillan Game Hunter
ARC Rings
Leupold 5 HD 3-15
Hawkins HDBM
Trigger Tech
First range day, factory ammo, .574" three shot