Upgrade it to a Luxeon 3 LED, and you will get 330 yards - easy.
Been there done it and it wasn't even running on all cylinders (750mA, whereas I designed it to run at 1.2A). Can't wait to see what it can do on FRESH cells!
BTW, it's fairly cheap, a TY0L Luxeon 3 from oeo2oo will be $16, and a Hotlips heatsink is going at $14. Nothing else needed except a little work on your part to modify it. You can run this config safely in direct drive, so no sophisticated electronics required.