I just purchased my first 300WSM about a month ago. Every load I've shot in it has been sub 1MOA and I found a load this morning that was well below that. Shot a .240", .304" and a couple .5" groups this morning with 165gr bullets at 3000fps.
The rifle is a Savage 12FVSS (short action, plastic stock, stainless steel, varmit contour). I put a 3.5x15x50 Nightforce NXS on top using the Dednutz one piece mount. I didn't touch the trigger, as it comes with the lighter Accutrigger.
Although the rifle is essentially stock, I did purchase a go-gauge, action vise and barrel nut wrench. I replaced the recoil lug with a machined lug and lowered the headspace from .012" to .0015". (took all of 10 minutes).
The stock is the weak link as its really flimsy, I have a Laminate A5 from Joel Russo on order, which should make it as fine a rifle as can be had for the money.
I found the rifle on Gunbroker, they can be bought (buy it now) for around $560 + shipping.
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives