Owing to the
vast number of 9mm barrels being made today, a lot of makers are simply reaming the chambers to make 38Super. So yes, it's quite possible that
your 38Super might slug at 0.355-0.356".
BUT... you'll need to slug your barrel to find out. We can't advise you on what your barrel may or may not measure.
Batteries not included. Some assembly required.
