Old school vs modern ballistics ...
It's debateable but to me the fixed sight K or med frame .38spl 6 shot revolver was
the standard in American culture for
decades. Mainly up until the early 1990s or so.
Other calibers and handguns were signifigent too but not in terms of sales, use or familiarity.
The S&W model 19 .357magnum opened a lot of doors, it had the same size/specs as a S&W model 10 or 15(adj sights) but fired the potent .357magnum caliber(6 shots). The introduction of the 66 or stainless steel format made the S&W line even more popular with cops, private citizens & state troopers.
Many federal agents & officers routinely packed a S&W K frame 4" or 2.5" barrel 66 revolver for 20/25 years with no problems or complaints. Some even got commenrative model 66 revolvers engraved or decorated when they retired,
.
Ammunition designs and the problems with power/feeding or misfires kept many gunners with either .38spl or .357magnum wheel guns.
Few shooters or cops ever really knocked the 125gr JHP .357magnum. It met the limits of recoil, muzzle blast, power and flash for most gun owners/officers.
S&W later rolled out the .41 magnum and larger .44magnum but neither ever replaced the .38spl or .357magnum for most handguns.
Another point that can be made re: change in ammunition designs/upgrades was the
Platt-Matix incident in Miami FL 1986. I'm not going to get into the details here(there are
plenty of forum topics on the subject
) but that FBI gun fight really led to serious changes in both modern semi auto pistols & ammunition styles. The rise of semi auto pistols in LE and personal defense led the gun industry to offer better pistol rounds too. Feeding, cycle and storage/wear all got better with semi auto rounds in the 1990s.
Today, 2015, there are
far better choices for guns and rounds but the "old days" were okay too.