9mm's also have a choice of twist rates, IIRC, a Browning HP has a twist rate of 1-10" and a typical Smith 39-2 had a rate of 1-18 and change. Sorta like the difference between a Colt .357 (1-14) vs. the Smith's 1-18+. I have no idea what the twist rate of current Smith 9mms is, or those of other makers, but I never worried any about twist rates, figuring it was hard enough to hit the target in the right place first, then worry about the other stuff (just like when deer hunting, HITS count, misses don't).
I used to be a heckuva pistol shot, and didn't worry about these piddling things. Still don't. Aim right, shoot right, and get on with your life.
I was unaware of the earlier Smith 9mms having a different twist than 1:10. Thanks for the info.
With respect to "worrying about these piddling things", sometimes they are piddling, sometimes not. I used to have to worry about them cause it was my job.
