i have always thought some of this was funny. I.E. a 38special 158grain doing about 850-900fps. Not good in some circles. a 9mm 147grain doing about the same velocity, wonderful. a 38 diameter .357 a 9mm diameter .355 yeah okay. or, in a more enlightened age: a 45 colt diameter .454 250 grain at about 950fps. Say, this was figured out around 1873.
Kind of like a 44magnum is more than a 41magnum. lets see: .429 .410 big difference huh?
