For the 1.875 inch barrel, I'd only use the Speer GD 'for short BBLs" +P in their lightest weight for ft-lbs & expansion both. The .38spcl is a very mild round to begin with.
Its long casing in a hold-over from black-powder days. Gold Dot, Hornady & Cor-Bon know how to optimize them for CC, though.
These brands will negate the "bullets remaining seated issue". For practice, use decent range-grade ammo like WWB, Fed-AE, et al, in the same bullet weight you carry & you'll be good.