Upon having a case blow out with a 38 super I decided to cut a few cases open and see why this could happen. It wasn't a double charge, it was just an old case. Probably 70's vintage. The results of measuring the webs are below.
38 ACP(Winchester) = .025
38 Super(Starline) = .025
38 Super Comp(Starline) =.035
9 Super Comp(Starline) =.036
9x23(Winchester) = .054
WOW, what a difference. No wonder Winchester billed it a the strongest pistol cartridge ever made.
38 ACP(Winchester) = .025
38 Super(Starline) = .025
38 Super Comp(Starline) =.035
9 Super Comp(Starline) =.036
9x23(Winchester) = .054
WOW, what a difference. No wonder Winchester billed it a the strongest pistol cartridge ever made.