Scope comment, the scope is very important. You can't buy "to good of a scope". It's not at all unusual to spend as much on your scope as you did on your rifle. Seriously. Why build a high dollar rifle and skimp on the glass.
A good starting point would be to buy a Varmint Barrelled 300wm to start with. Then upgrade as you go. I could shoot just under 1 moa with my stock gun.
This is mine just before I sent it to the gunsmith for customization: