I've got some staball 6.5 powder to play with. The rifle is a R700 in 6.5 cm. Hornady brass, CCI large rifle primers and Hornady 140gn ELD-M bullets. Overall length is 2.8 inches. I started at 40gn and worked up to 44gn in .5gn increments. My best group was at 40.5gn. Has anyone else tried staball 6.5?
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