The 357 was invented by Elmer Keith to handle a load
hotter than a 38spl was rated for.
A 38spl case can be loaded to 357 specs but not
advised so the stretched it out 1/8th in so it could
not be fired in a lower rated 38spl.
The 357 firing a factory Federal SWC has twice the
penitration of a 44 Magnum
The gun pictured here is mine and is one of the
best handling guns I've ever shot