Speedloaders I recommend the Safariland Comp-I for the 5 shot J frame, and their concealable carrier which is a metal spring steel holder is very secure on the belt.

For the 638 any 158 grn LSWC or SWC-HP +P will do well, as you need the penetration and its hard for hollowpoints to consistently expand in flesh.

The HSTs do show very good potential!