Subsonic 300 Blackout with IMR 4227
Testing some IMR 4227 out in the 300 Blackout today. Using some Cast Lee 309-230 Powder Coated Rounds, sized to .309. Very accurate and spectacular numbers.
Range Session Starts at 8:38
My name is Josh and I love Firearms and Freedom. I started 243 Outdoors as a YouTube Channel back in 2015 and have branched out to other media sites.