I was practicing my BnZ Gunnery in the offline arena, and I got to thinking; when the other guy sees you behind him, he knows you're coming after him, and since your plan is obvious, he just gets out of the way.
being the sneaky bastard I am I began to toy around with other angles, high 12, diving in at high 9 and coming up at the low 8, ect.
My results weren't any worse than at the ideal angles, and I'm improving as well.
so far I learned this:
at high 12, you should open up on your target at twice the distance that your guns converge at, i.e. if your guns converge at 400, let rip at 800.
I'd really like to know if anyone else has experience with this.