I call that picture "Wasted Money" as a reminder that every component of a firearm must do its job.
The short version: 11 months to prepare for a Canadian moose hunt. Dad buys a custom .300 Win. Mag. barrel with break for his Encore Pro. Adds new Leupold VX-3 and Leupold QD rings. 1 box "cheap Winchester ammo, 6 boxes Hornady Superformance. Rifle sighted at 100 yds. in 6 shots (3-shot confirmation group included). Enter "Premium" ammo.
10" spread. Shoot 2 boxes, call son (me) concerned about new barrel. Enter son, LocTite and torque wrench. Loose rings properly tightened. Return to "Premium" ammo. Return to 10" groups, 4 boxes, order more "Premium" ammo.
Call smith, take rifle and 2 boxes ammo for evaluation. Get nervous...drive 4 hours to Cabelas and spend points on Savage 116 (with break), Leupold rings and borrow son's spare scope. Rifle sighted in with "cheap" ammo. Enter "Premium" ammo.
10"-12" groups, re-check scope. Clean and clean and clean again. Enter gunsmith...case head separation with "Premium" ammo, sub 1/2" groups with "cheap" ammo.
There's a whole lot more to the saga that was a tale of two rifles but in the end both managed sub MOA with Super X, a 63 yr. old and a set of tri-focals in the mix.
It's not always the shooter or the rifle or the ammo or the scope or the rings or the bases (did I mention the loose base?). Sometimes it's a combination of things as with the first rifle and other times it's the mindset that one particular load must surely be the best there is based solely on price. For all that went in to that hunt, a lowly 180 gr. Super X dropped his bull moose with 1 shot, at 323 yds. the first hour of the hunt.
I would surely recommend a more appropriate ring height, a muzzle break if you can spring for it and a good bit of trial with your loads, all of which have been suggested. Not every factory sample will shoot as well as every other but I don't recall any I've owned that were not capable of 1 MOA or better.
Sorry for the book.