For off-the-shelf the 2 you looked ay (Fierce and Seekins) are making great builds, plus I think they both will do custom changes. The Proof Elevation is in the same price range as a custom Seekins or the higher end Fierce rifles, it comes in a 300 Win, and is super light weight.
proofresearch.com
- Price example of the Proof
Shop Hinterland Outfitters for the PROOF RESEARCH Elevation Lightweight Hunter 7mm Rem Mag 24 in Carbon Fiber Black Right Hand. MPN: 128350 | UPC: 843068128350.
www.hinterlandoutfitters.com
Craigs in Tucson has built 9 rifles for my father and I (5 were long range hunting rigs) that all shoot Sub 1/2 MOA. The pict I included is my Wife on the sticks in Africa with my Craigs 6.5 PRC about to drop the hammer on a Kafue Lechwe that was only about 150 yards away. These are total customs so they can run $2.5K to $5K usually, depending on the action, barrel, stock etc.
3 - 7mm LRMs
2 - 6.5 PRCs
2 - 300 WSMs
1 - 22 BR - target
1 - 22-250 - Prairie dogs coyotes etc.
Craig's Custom Rifles (Phone 520.405.3662) Arizona custom rifle builder of precision long range hunting, competition, benchrest, and tactical rifles that come with half MOA guarantee. Based out of Tucson / Oro Valley, Arizona (AZ) we provide top quality service related to riflesmithing...
craigscustomrifles.com
There are tons of great builders around the country, I just know Kyle really well and what kind of work he produces.
3 Year History on my 6.5 PRC
4 Coues Bucks, 340yards to 743yards
18 head of African Antelope 80 yards to 500 yards including a giant Southern Eland at 500 yards.
Check out the info on the page below and listen to the podcast before deciding on your cartridge. There is relevant data there that may be eye opening. These fellas know about and shoot more long range than just about any other company around. There other good podcast they have that break paradigms based on the 1000s of heads of game they have shot at long range over the last 11 or so years.
www.gunwerks.com