IIRC the 135's were first used by people shooting 38 Super and it migrated down to the 9mm.
For years there wasn't much, if any, load data for 9mm.
Jeff Maass site
http://www.k8nd.com/documents/hl38sup.pdf
http://www.k8nd.com/documents/hl40sw.pdf
http://www.k8nd.com/documents/hl9x21.pdf