I purchased a jug of IMR 4007ssc a few weeks ago to give it a try. I tried it in the ole thurdy-thurdy with cast and j's along with the 300 win mag and j's. I acquired roughly 3/4" groups with both guns and both boolit types. It didn't shoot quite as well as specific powders with specific boolits in the particular guns. Though, it gave acceptable results. The IMR 4007ssc seemed versatile in the gun/load/boolit applications that I tried. I'm not sure how it meters, as I weighed each load.