My buddy has a .300 WinMag SPS that was 100% stock at the time, and with some load development, we had it shooting 178 AMax's into ½" cloverleafs @ 100 yards. Completely factory w/ the crappy X-Mark Pro trigger.
Not that they will all shoot like that, but just letting you know what they CAN do if you get a good one.
Also, like you said, you can never have too many rifles. And tinkering with it is what most people DON'T do, and then they gripe that it won't shoot with the very first load they try... It's a $550 rifle...It's not built to shoot sub-MOA. However, by purchasing that rifle, you always have a great platform to build off of, because you have your 700 action, and your bottom metal BDL setup, which are 2 of the key components for a custom build. All you will need from there is a trigger, barrel blank, and a good stock.
I look at all guns as projects. I buy them, and if they shoot, awesome! if they don't...Oh well, now I have an excuse to build a custom.
Don't just bed the recoil lug...Bed the whole action & the lug & don't forget to float the barrel. You will probably be best off to go ahead and buy a Bell & Carlson Medalist stock for it, which has the full-length aluminum bedding block in it. Then bed that stock. Stockey's sells them for about $265, and has them in a bunch of different color options. Some people don't like them because they're inexpensive, but I can tell you from first-hand experience they are EXCELLENT stocks for the money. And at that price, I really don't think you can beat them. Next level up is an HS Precision, but those will run you around $400.
All of my customs use hand-lapped, trued, and re-crowned factory Rem barrels (professionally worked & accurized by my smith), and they all shoot sub-½ MOA with developed handloads. If everyone wants to go buy $350-500 barrel blanks, go right ahead. That means more factory barrels out there for me. But until I run out of new factory barrels for $75-150, I'll keep doing what I'm doing.