I've acquired a bunch of old and new factory .38 Special ammo and plan on chronographing it to compare velocities. Have been at it for a couple years, hoping to get as much test ammo as possible, but the ammo shortage has caused some problems. Here's a pick of the old stuff so far, and I have an equal amount of newer stuff. I did the same thing with 38 Super a couple months ago and posted the results here and on the Sig forum, but there was much less of that ammo available to test, especially the the older stuff.