Thread: 357 mag subsonic reloading data

Definitely I always work down.
A glance at X700 data has a start of 3.4gr for LSWC for 867fps in a 10” barrel. Could be a contender.
ADI shows 6.5gr AP70 in 18” barrel using LSWC at 1350fps and 5.8gr behind a 158xtp for 1059fps is minimum load. I have tried 5.8gr behind SWCHP and found it to be faster than speed of sound. Worked back from there and ended up at 5.5gr. Here is where the ES opened up and I’m below 45% case capacity. Shock horror I know but was rolling between 950-1100fps. I stopped there.
I have read stuff in the past about flash hole opening or changing primers.

As I say, just checking to see if anyone else has been here and done that and whether they had some good results.
After a quick ph around today, no-one seems to have any Trailboss and don’t know when it will be around again.