DANGER WILL ROBINSON DANGER
Better check- I do not believe you have a .38 Special. It was a .38 Colt Long. Originally made for a 150 gr lead bullet, and 19 grains of black powder, It is a shorter cartridge, and a shorter case than .38 Special.
You MAY find some modern ammo, or you can trim .38 Special brass back. Suydam's US Cartridges and Their Handguns lists 3.0 grains of Bullseye with a 150 gr bullet.
Would have a smith check before shooting ANYTHING, and DO NOT shoot .38 Special.
BTW, this was the cartridge and gun that did a dismal job of stopping the Moros in the Phillipines, and brought about the .45 ACP.