6.5br, I shoot varget powder for all bullet weights, I use this gun for high power silhouette. I load the 130's for the c,p,t and the 168's for the rams, all sierra bullets. I also load varget with the 150 gr. SMK, I use lapua 6mm br brass necked to 7mm for all loads.
I've shot a couple or more groups under .5 MOA at 200m with H4895 with a stock stabilizer and flags. If you're interested in the load I can dig it up. That was probably 130MKs but also shot really good groups with H4895 with 168MK. For cast 140 and 168 I found H322 worked better.
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