Nothing wrong with the Speer 135 grain GDHP however I believe the Buffalo Bore #20A is even better.

The 158 grain LSWCHP-GC bullet leaves a 2" Chief's Special at 1025 fps - confirmed many times with my Chrony. Not only is it about 200 fps faster than the GDHP, but it is 23 grains heavier. IMO it is about the best you can get in +P .38 Spl. if you can handle the stout recoil. Not too bad, but you'll definitely know it's something different!

The BB is also really accurate, about the most consistent load I've ever shot, and I've never had one single hitch with them.