Vihtavuori used to have several LSWC loads posted on their website, they seem to have taken the data off, but here it is:
124gr LSWC
6.5 gr 3N37 1,124 fps1.437" OAL
4.8 gr N320 1,067 fps1.437" OAL
5.9 gr N340 1,113 fps1.437" OAL
6.3 gr N350 1,141 fps1.437" OAL
You'll have to experiment to see if these actually make minor from a real gun as opposed to a test barrel though.