Dr. Tad,
Mea culpa. I was assuming you were looking for useful information, such as I provided. I have been shooting and handloading for ARs in various calibers for nearly 35 years. You don't test for accuracy by "standing and shooting at 25 yards" with an AR-15.
If you are utilizing good bench rest shooting skills and are getting 2-3 inch groups at 25 yards with an AR-15, there may be a serious problem with rifle, ammo, and/or shooter. You may do well to take up another sport.
And for Mr. Sediment, 16 inch barrels with 1:9 twist don't usually stabilize the heavier bullets (69gr+) as well as the lighter ones (45-63gr). You will find that out when you shoot out to 100 yards and further.
Out of my Colt Match Target (9x scope, 16 inch barrel, no wind), Sierra 52 match hp groups flirt with .50 MOA while 69 Sierras spread to .75-1.0 MOA.
When I switch to the previously mentioned 20 inch "Crapmaster", the same 69gr loads shrink down to a bit under .60 MOA...
Though as always, YMMV.