If the rifle is for LR hunting up to ONLY 600 then the 308 will work. However if you are looking past that then you will want a magnum.
IMO the HS Precision guns are way over priced. Lot of quality smiths around that can put a topnotch 308 together for around $2k and even less depending. You have a couple here and the pick any of the "top recommended smiths" from www.6mmbr.com
In fact you can go to www.snipershide.com
and find at least 3-5 of these guns for sale every day for $1500-2000 with very low round count. Most of them are from GAP and LSR which are top notch smiths. They also have lots of used Zeiss, Leupolds, USO and Schmidts for sale also at great savings.
The best out of the box gun in 308 right now is the new Savage FT/R in 308 with 30" barrel and it runs $925 from Northlander on www.savageshooters.com
. This gun was made specifically for the 1000 yard F class shoots and is really accurate and staying with the custom guns for half the price. Most are shooting 1/4 MOA.
Add a 20-30 MOA base and if get the new schmidt and bender scopes that is the top of the pack right now. The new Zeiss conquest is more than enough scope and saves $1500..
Savage FT/R and zeiss cost $1700 and 1/4 MOA. Leaves $3300 for bullets and match fees to learn to shoot distances.
and Schmidt or USO cost $5000 and 1/4 MOA