I just tried the 158gr Lwc in my 6" 38 special with the new BE-86.
There is not much data out there but I loaded up in the middle of Alliants data
to see what turned out on the drawing boards with the
148, 110,125 and 158 standard target bullets.

The 158gr lead with 5.2 grs of BE-86 out of the 6" 686 revolver
turned out 951fps and a POA group that I could live with.

In my 38 snub nose a full load of Bullseye with my new box of 148gr BBwc
hit at POA and was right at one inch, with no flyers, off a bag.
Sorry no chrony with this test.