l have maybe 1500 rds of Super Vel ammo in various calibers from 380acp to 44mag. 0ccasionally lighting off a few rds to compare with todays offings my wrist says Super Vel is still KING. 38Sp for sure......... l have only chronod' some of their 180 gr stuff in 44MAG. From my 29-2 they ran 1803fps. Remington 180s went 1575.
l have a couple boxes of 38Super but have yet to shoot any because both boxes are full.

My op of plusses and pees---- they mostly hype.

l have a couple of old NRA loaders handbooks from the early 50s that list factory ammo pressures tested by HP White Labs. Std 38 Spcl pressures were in low 20s. 357mag in 38,000 PSI range..

HP White Labs are still in business and still test ammo