So, there are evidently no interested MR1 users. I just finished another disappointing day at the range with the MR1. I have owned my MR1 since new, it is one of the first 600 made. I take to the range every now and then to try another load.
It simply will not consistently group any load which I have tried at better than 2.0MOA. It reminds me of an older Mini14. The bullets just scatter. I have used 55 to 68 grain bullets, W748, Varget, and BL(c)-2 in my attempts.