Months later and I still don't have an answer. There are many servers where the clip size and total ammo count are far higher than normal, and I'd really like to know how to do that. I went through the syntax and wrote the above file, but the server console proceeds to tell me it doesn't recognize the manager reload command, and the rocket jumper remains unaltered.
I've grown frustrated and can't get anywhere. If I don't get a response I'm afraid I'm screwed there and will end up giving up.