That's the same exact problem that I had at first, with everything that I tried in a 38 spl case. After much discussion with my local gunsmith, and an email exchange with Steve I started seating that boolit out so that I crimped my 38 special cases into the forward edge of the grease groove. The original crimp groove is exposed, greaseless. Now the 38 spls don't do that any more. I haven't loaded this boolit into 357 cases yet but they shouldn't give that annoying jam. I noticed that the same jam occurs with 158 swc's in 38 special cases, but cycle fine in 357's.