Theres a jump academy sub forum literally 1 down.
The jump assist removes the ability to get regen from func_regen brushes, you will have to type /regen on to prevent all ammo reaching 0:0
If a server isnt using the latest jump assist, and your issue is the func_regen eating your clip, your best bet will be to either go a jump assist server and do the above or go offline/local type in "ent_remove_all func_regenerate" and bind [key] "impulse 101"