I tried this a long time ago; it doesnt work nearly as well as you might expect. Pistol has a forced delay between shots, so it just ends up like wheeling jump- you no longer have to time your shots, but youre not actually shooting any faster either.
There is one big benefit, though, which is that you arent wrecking your aim by hitting the mouse button repeatedly. Moot point if you primary fire with a non mouse button, but then again im not sure anyone actually does this (though i will, when i make my next big config change!).
EDIT: Seems this thread is now “mine” since grapes op has been recently deleted. Scroll down to Seagulls quoting of the op for the above to make complete sense.