I'm stating what is true.
The AR/M16 platform has been around for decades and made its way in shooting competitions all over. Free floated barrels, 2 stage triggers were all developed over the years to make it an accurate rifle. In short, the development has been done and mods that worked are what you see today. i.e. handguards that float the barrel, 2 stage triggers. things that didn't work you don't see marketed or on match ARs. I'm not on the level of many competitive shooters but did my share of traveling and chasing leg points. On the competitive circuit the rifles I see are common across the board. A good barrel that is floated, 2 stage triggers and now with optics - scope bases that are optimized for good stock weld i.e. the Geissele "NM" mount. They all have a common theme. They work. You won't see a Limbsaver deresonator on John Holliger's or Frank White's websites. I doubt you will find one in the AMU's shop or any other service's shop.
The same is with loads for the AR/M16. They are proven loads out there and serve as a baseline. I didn't develop these loads but have shot them through many AR barrels from Wilsons, Douglas and my current one - a Shilen. If my groups were bad they always came back to me - the shooter. So I troubleshoot my position and other possible inconsistencies. The last thing I want to do is cover my mistakes with more gadgets.
To be frank, RK's quest to find a good load is hampered by his platform and shooting position as I opined. There are so many variables that he changes every time he posts results. From target background color, scope height, and I'm guessing shooting position.
I try to help out people at the range. Some people listen some people don't. One example is the placement of the spotting scope AFTER setting up your shooting position. A shooter with a spotting scope way over on the other side of the table wonders why his/her groups are all over the place because they break their shooting position to see a shot or one group. I was that person till I listened to other shooters.
I'm just paying it forward.