I bought some once fired 38 Special brass and found 5 of these, 38 Colt SPL. I measured them and they are the same measurements as 38 Special. The way I first noticed a difference was the flash hole was a tight fit on the de-capping rod. They are balloon-head cases, I reloaded them with a light charge and will keep them unfired. I know they are old but does anyone have any ideal about their age or history of cartridges marked 38 Colt SPL?
Roger
Roger