BC, here's my response to the buy/build dilemma that I guided you through:
This isn't my first precision gun. The key thing with your purchase is that WHEN (not 'if') you decide to go bigger and better, you can still get an awesome return on your investment. Hell, you will probably keep it.
I guarantee... (Gar-an-effin-tee!) that once you are regularly hitting at 500 and 750, you will want to push that envelope a bit. It's THAT adictive. The .308 can do it, but other calibers can do it sooo much easier. Out of 130 shooters, maybe 5 were shooting .308. Everyone else was shooting one of the following calibers: .260 Remington, 6.5 Creedmore, 6mm Creedmoor, 6XC, or .243. The .30 cal bullets just can't get past the wind until you REALLY push them fast, like through a 300 Win Mag. If you want those type of ballistics properties, just save yourself the recoil by getting one of the above calibers..