Incidentally there are 2 variants of C-130J's, known as C4's and C5's in RAF service, although I forget which is the standard length aircraft and which is the "stretched" version (I suspect C4 and C5 in that order...)
The C4 is the 'Stretched' Herc J and the C5 is the 'short' J, The opposite way to the C-130K which the C1 is a 'Short' K and C3 is the 'Stretched' K.