Your ok for 38 special. http://remington.custhelp.com/app/a...sion/L3RpbWUvMTQyOTA2NjM3Ni9zaWQvMzY1empVam0= I use the 5 1/2 or any magnum primer. Less chance of a pierced primer. IMO.In pistol cartridges, the 1-1/2 small pistol primer should not be used in the 357 Magnum, 357 SIG or the 40 S&W. The 5-1/2 small pistol primer is the proper selection for these rounds.