This rifle will primarily be for long range target shooting, ringing steel at distance,
I have 2 260s; one built on a M70 long action for hunting, and one built on a FNH short action for distance. I also have a 6.5x47L Model Seven hunting rifle.
With the 47L, you are limited in case selection, unless you reform another caliber. Which is an option to gain a larger primer.
With .260, there are enough choices out there to use several brands. Which proved useful during the shortage a few years ago. I actually use Norma and Lapua for different loads in the same same rifle. I also use Remington, which works fine also.
I have Hornady Creedmoor cases, but no rifle in 6.5 Creedmoor. Go figure....
If you want to build, you can purchase a Model 700 action from Grab A Gun, MGW, even Buds has them from time to time. Average cost around 400-450.00. Barrels can be had from 300 ish to 400 ish. Stocks around 300-350. Build labor, figure 200 to 600, out the door. Pretty soon, you'll try to forget how much you have in it and just focus on enjoying shooting it... ;-)
I do see some good deals on already built rifles on the auction sites, and a couple of other forums.