12-07-2014, 08:06 AM
Sgt45 Wrote:I'm shooting a 20" barrel but interested in sub-sonic. Has anyone tried 140 gr bullets and IMR 4198? I've found 4198 works very well in my short 300 BLK, just wondering about the Grendel? I haven't found a source yet for the 160 gr bullets and was curious about the 140.
I'm interested in 140gr data as well. I made some 140s the other day with 7.5gr of Unique that were definitely subsonic, but I'm not sure the 140s build enough pressure to run the action at subsonic speeds. Going to try loading a few backwards tomorrow. Helped a lot in .223 loading M855s backwards......