"Standard 38 super loads are no more than standard 9X19 loads, I do not use 38 super brass though. It is slightly shorter than largo brass, and semi rimmed. I stick to starline largo brass."

But the .38 Super case is not enough shorter than the 9mm Largo case to make any difference. Within manufacturing tolerences, they are the same, except for the semi-rim of the .38 Super. Starline also makes a case called the 9mm SuperComp, the case length of which is also identical to the 9x23, 9mm Largo, and .38 Super, and I have 500 such cases. The 9mm Super Comp is also rimless, but is supposedly a little stronger than the 9mm Largo and will take higher pressures. I have used them in 9x23mm Winchester full-house loadings with no difficulty. One of the Starline guys told me that was perfectly OK, as they will take the higher pressure. They also work fine in my M1911 9x23mm Winchester barrel.

BTW, I use .38 Super reloading dies (Lee) for 9x23 Win, 9mm SuperComp, and .38 Super cases. Very satisfactory for all. I have a 9x23 Win RCBS die set, but don't use it, as I prefer the Lee set.