Many years ago, I chrono'd some .38 and .38+P loads for a friend. 2400, Unique, and Power Pistol were the powders used. All bullets were Lee 158 RNFP, Alox lube, and Fiocchi cases, CCI std primers.
Barrel length were 3" and 4" .357 guns.

2400- 10 gr 888 fps 3", 912 fps 4"
2400- 11 gr 1112 fps 3", 1111 fps 4" Book load for 38/44 replication

Unique- 5gr 861 fps 3", 882 fps 4"
Unique- 5.5 gr 946 fps 3", 985 fps 4"

PP- 5.4gr 888 fps 3", 903 fps 4"
PP- 6 gr 970 fps 3", 994 fps 4"

free info, worth what you paid for it