Ryan, my testing of small rifle primers has been almost all in the 6BR with 105 grain bullets with loads geared to 300 to 600 yard shooting. I'm not a Benchrest shooter, although a few more years of laying on my belly in the dirt might change that (37 years of fighting ants, spiders and scorpions for range space can be tiring).
I have a .22 PPC (also a prone rifle, shoots 80 Berger VLD's) and in that rifle, results were consistent with the 6BR, the primers with the lowet visual flash (Russian and 205M) gave the best numbers and the best accuracy. However, the 205M primers blanked in my .22 PPC whereas the Russian SRM held together without any problem.
Thanks for the kind words on my testing, I've had the good fortune to team up with Bob Jensen for all my primer work, he's a real pioneer in the field and we have a lot of fun testing and analyzing all of this stuff.
German Salazar