DWalt is on the money. No need to worry about factory or mild handloads for 38S&W using smokeless powder. If your gun in in good condition, that is. Watch for corrosion in the chambers--in extreme cases rust there could weaken the chamber.

With my first 38S&W DA Top-break bought last year, I made up a few rounds of ammunition using cut-down 357 Mag cases and 125-grain lead 9mm bullets. Just as a trial, to get by without springing for a box of factory loads. Yeah, the 9mm bullets were a bit undersize but shot fine and were not noticeably less accurate than factory S&W cartridges I later got around to buying.