Brianma65, I am sorry to hear that my process which is outlined isn't to you liking. the tools, methods and process are identical to how I approach setting up any precision rifle. The brass, dies are actually stuff I use in my FTR competition rigs. The bullets, powder and primers are well regarded with a long history of working in semi auto platforms. I shot under the best conditions including wind and light... choosing to shoot at 100yds vs 250yds as the weather was rainy. 100yds would have been considered easier don't you think.
The same bipod and rests that help me win at 1000yds were used to support all of these NR AR's... Supports and rests that routinely let me shoot 1/3 MOA or better at 250yds with my FTR rifles.
Throughout this test, I have explained the how and why and then going to greater lengths to shoot the MH in various formats to find the best method of operation. All that mag loading stuff was to help the MH avoid any operational pitfalls. It can be argued that I went out of my way to stack the deck in the MH's favor!
Working up loads in 0.1gr steps held to the kernel of powder (all charges weighed on an FX120i scale) is far higher precision then the vast majority of reloaders. When I found the most promising load, I returned for several range trips to test and retest to form an average of how it would perform. You can see that later testing was all 5rds groups with 2 or more groups typically on the same target. I have no need nor interest to "game" my results.
For better or worst, the bullets landed where they did.
I have tested 150gr, 168gr and 175gr bullets in the MH. Yes, the 175gr was "only" GMM ammo but I think many will accept it as pretty decent stuff. Is there some magic combo that might bring that MH into the sub MOA AVERAGE? Don't know but the results I got lead me to believe, for this particular MH, no.
If you do not like nor trust my results, I hope that you will perform your own tests. Take your rifle, work up the best load, and do your own accuracy testing. Don't tell anyone... just play and enjoy the satisfaction of enjoying a very nicely made rifle and a sport some still enjoy.
Grab a target at whatever distance you want and shoot 3 to 5 groups of how many rds per group that works best for you... all on 1 piece of paper. The rifle will do what the rifle will do. Use every means to give the best result... measure the groups and the result will be what it is. The AR challenge is a great demo for what any rifle will average.
WRT to my background in AR's. If memory serves, I shot the smallest average for the 2016 CGN AR challenge and that was 5X5rds on the same piece of paper... that was backed up with another 4X5rds on another target. Unfortunately, 1 shot took the 5th group outside the accuracy goal so for 49 shots on 2 targets, my AR AVERAGED a level of accuracy that would be considered .... 'decent'.
A HERO group isn't the benchmark for any rifle... the average is (I did shot some really nice sub MOA groups with the MH). If your MH can average sub MOA, that is truly a wonderful rifle and congrats. If you want to show us how it performs, that would be great but not necessary. In competition, every shot is scored so every shot count. I don't do best out of... and I don't make excuses.... the target and my competition don't care.
YMMV
Jerry