I don't have the LRPV but I do have a .204 model 12 heavy varminter. I found that MINE is very picky!! Found one load that shoots 1/4-3/8" (@ 100 yards) groups this morning. 30.2 grains of BLC-2, 32 grain sierra blitz kings at .009 off the lands. I have another if I can find it with the 39 grain SBK that shoots under 1/2" but it uses Winchester 748. From what I tried this morning the 39 grain SBK's with BLC didn't group but I only tried 7 four shot groups. All at .009 off the lands. Hope you get more responses as I would like to know some more to try too. I'm not liking how picky this barrel is!! Almost forgot! 7 1/2 remington primers and remington brass.