Best accuracy is a relative term. I’m perfectly happy with 5 shot / 1 to 1.5 MOA accuracy from my hunting rifles.
My sporterized 03A3 is an example.
https://www.thehighroad.org/index.php?threads/30-06-hunting-load-work-up-2-0.827446/
You know, getting a hunting rifle to shoot two MOA at 300 yards or beyond is pretty good. I have lots of 100 yard targets, ten shot groups, nice groups. I have tended to weed out the ugly targets, so there is bias in the data, I will keep a sub MOA target, which are very few compared to the number of targets I did not keep. But you know, a good hunting weight rifle, yes 1 to 1.5 MOA is pretty good, at 100 yards, When I have taken my good hunting rifles to CMP Talledega and shot out to 300 yards, (a few at 600 yards), you know, the ten shot groups are closer to 2 MOA than 1 MOA. The further you go, the larger the group gets. I believe this is a reflection of how difficult it is to shoot a lightweight rifle. The things are twitchy, little differences in trigger pull direction show up on target, hunting rifles don't have adjustable cheekpieces or buttplates, so the stock weld is very inconsistent from shot to shot.
You know, a Benchrest Champion, on another forum, just pissed all over these 300 yard targets of mine.
But, he never showed me his 200 yard offhand groups with his Benchrest rifle. I would like to see those, and compare my M1a or Garand offhand targets to what he shoots offhand, with a Benchrest rifle.
Out to 100 yards I consistently shoot tighter groups with my BSA MKIII 22lr, prone with a sling, than I do with a centerfire hunting rifle off the bench. The BSA MKIII weighs 14 1/2 pounds with irons, might be 15 1/2 to 16 with my Redfield 3200. That extra weight means a lot. When I take this thing to Talledega,
it will hold about half the ten ring at distance (shooting prone)
But it is not a 7 or 8 lb hunting rifle. I have not weighed it, but it has to be 14 to 16 lbs with a scope.
I do believe the obsession with velocity is because velocity is something that can be measured. Humans are quite irrational, they have these compulsions, more means more sort of thing. (Does anyone really need a 700 horsepower Hellcat when the speed limit is 70 mph?) Also from what I have read, humans are poor judges of absolute value, much better at relative value judges. The K cup coffee take over of the market is an example. The K cup is very convenient, in less than one minute you get a cup of poor tasting coffee. But, has anyone compared the cost of a K cup to brewed coffee? I can buy a bag of Mocha ground coffee for $3.72 that will produce 42 cups of coffee. A box of 48 K cups is $14.98. People don't notice the absolute cost difference, only the difference in price between K cup brands. They think they are getting a bargain when they buy a box of 48 K cups for $13.50.