All aiming is at the top of the bead. All shooting was done offhand.
I hadn't mentioned that Merkel had supplied the wrong sights (it came with one of those horrible plastic front sights and weird rear sight that is popular in Germany), and so the distributor in Australia got Merkel to send over the express sights that I had wanted. These were installed by a Melbourne gunsmith; I presume they weren't test fired before the rifle was sent back to me. I have no desire to send it back for another 3-6 months, and so was hoping for a local fix.