Needed a thread for the data as we play around with this new offering.
SO... still breaking everything in. Had to make some guesses as to where to start with IMR-8133(or any other powder for that matter) I used Retumbo in Quickload for predictions but the velocities and pressure were low.
108 deg 30% humidity today All loads 4.610" COAL IMR-8133 215M primer
375MTH fps 402MTAC fps
117.1 2820 113.1 2779
117.3 2891 113.3 2787
117.5 2850 113.5 2715
117.7 2855 113.7 2808
117.9 2903 113.9 2794
118.0 2912 114.1 2793
118.1 2920 114.3 2773
118.2 2868 114.5 2776
118.3 2935 114.7 2807 <<<very slight crater/swipe
118.4 2885 very slight crater
Shot 5 rounds, waited 10 minutes; shot 5 rounds, etc. It was hot. The hottest of the 402 loads was the last shot of the day.
YMMV, still don't have 50 rounds down the barrel yet
SO... still breaking everything in. Had to make some guesses as to where to start with IMR-8133(or any other powder for that matter) I used Retumbo in Quickload for predictions but the velocities and pressure were low.
108 deg 30% humidity today All loads 4.610" COAL IMR-8133 215M primer
375MTH fps 402MTAC fps
117.1 2820 113.1 2779
117.3 2891 113.3 2787
117.5 2850 113.5 2715
117.7 2855 113.7 2808
117.9 2903 113.9 2794
118.0 2912 114.1 2793
118.1 2920 114.3 2773
118.2 2868 114.5 2776
118.3 2935 114.7 2807 <<<very slight crater/swipe
118.4 2885 very slight crater
Shot 5 rounds, waited 10 minutes; shot 5 rounds, etc. It was hot. The hottest of the 402 loads was the last shot of the day.
YMMV, still don't have 50 rounds down the barrel yet
Last edited: