Is it possible to hit max damage on each line of uncharged big bang?

True, but the range and button mashing aspects still apply.

Actually...if you use XPadder, you can set the BB button to "Rapid Fire". I've never had experience where doing this disconnects you, and with charged spells or hold down abilities, it spams them really fast. In the case of Hurricane-like skills you're slower, but in the case of spamming BB, you'll cast it faster than you ever could humanly.

Range is still an issue though.