My magic bullit was a 9g 7.62mm full metal jacket rifle bullit. A real killer :-)
Sorry couldn't help it.
My first MB was when I only had the F90X. I really needed a F100.
Then came the SQA-i
Then the 85mm f/1.4 Then large format (13x18cm) followed by the zeiss 25 f/2.8 zf followed by the chamonix 45 F1 and now mamiya 645 pro.
You know what? They are really magic:-)