For the Barnes TSX's, mine is a 1:9 , a Pac-Nor SSSM, on one of my Ruger #1's.

I also have a Rem 6mm, 1:9 McGowan, on my Savage VLP.

haven't shot any Barnes out of it. use it for ground hogs, & punching paper.

I use H-4350 with Hornady 75 gr. V-Maxes, & 105 gr. A-Maxes. really hard to tell the difference between the R-19, & the H-4350 in my rifles, except maybe a tad more velocity & accuracy with the R-19. of course, that may just be one of my good days shooting too.