I just installed a new barrel and an ARMS #40 rear sight.  When sighting I ended up 12 clicks off of center.  

There are 70 clicks on the #40 altogether so I still have 23 clicks to go before I run out of windage to the right but was curious:

A. Is 12 clicks off center is considered normal?

B. If not I should redo the barrel to get the sight closer to center?

Can't answer the first, but how would redoing the barrel going to address it?

To remedy the cant of the newly installed barrel.

Well, I called BM this morning (mon) and the tech stated that 3-5 would be normal while 13 clicks would be the absolute limit for a 16".  So I ordered an armorer's action block and will try again.  Still, I guess I should consider myself somewhat lucky since this was my first barrel change and we used a makeshift barrel vise clamp--now as long as my luck doesn't run dry when we try again with the right tools [%(]