I have loaded cast in .357 since the mid 80's, Shot a lot of various 150-165 gr bullets over loads like 5.5-6.0 of unique. I got a 4 cavity 358429 about 5 years ago. I noticed it did not shoot well
at these load levels. I bumped it up finally finding a good load at 14.0 2400, it shoots this better than I can. All my loading has been, contenders, L frame smiths and a 649 jframe. ( this load is no fun in the j frame).
All this is crimping in the crimp groove as everything I have had and loaded for accepted this OAL.
Load it to 357 Mag levels with a slow burner, 2400, H110, 296 and it will come alive.