I found some HP38 in the shop and I do load for a .38 Special. Who uses this powder and what charge do you give a 158 grain lead SWC? I don't think Hodgdon's max load of 3.7 grains is going to get it. I've called them before when their listed charge was below what I'd been using and they told me if I liked my heavier charge keep using it as it would be just fine. Haven't looked at their data much since then.