I know this is an older post but would like to add my 200 lrx load also. I use 85 grains of retumbo and a gm215m primer. Loaded to 3.662 for .090 jump this load shoot a 1/4 moa and cruises at 3142 ES of 10 and an SD of 5. This is from a 28" PAC nor barrel with a tight neck chamber.
I am hoping to try this out on caribou from some distance before the season closes.
Reuben
AKGuide,
Thanks for posting the data ! I have 2 boxes of the 200 gr LRX bullets I've been wanting to try,
I also have a tight necked 300 Rum (29" Hart bbl)
got a couple 8lb jugs of Retumbo, gonna start burning some of it up