Does any one have any experience with making subsonic 147 xtp loads for a 16” barrel. I tried 4.2, 4.4 and 4.6 grains of true blue. Loaded to 1.1” oal. The 4.6 load was the only one that was consistent. I thought it was a clean powder but brass is fairly dirty after being shot. Almost like there is not enough pressure to expand brass and seal. The 2 lighter loads were very inconsistent with 100 fps spreads. The 4.6 load dropped down to a sd of 16 at 1070 fps. Do you think it would be better with a faster powder that normally wouldn’t be first choice with 147’s. I have 231 and 244, and a couple others. Looking for consistent subsonic, not speed or power. Power pistol seems like it would do the same as true blue. Any thoughts or experiences I would appreciate.
9mm for suppressed pcc
- Thread starter sphingta
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