I use 42.6 gr of H4350 with 140 ELD-M, BR4 primers and Lapua brass. Ruger Precision Rifle. I can consistently keep my SD around 4.5 - 5.5 (as low as 3.1 measured last year) and my muzzle speed measured with a MagnetoSpeed V3 averages around 2800FPS. My overall case length is at max of 2.825...