can we talk plug gaps?

I'm trying to determine what the best gap would be for my set up and figured you guys would know as much as anyone, I know alot of people here run cd ignitions and hei conversions and have expierence with trying different gap sizes.
My engine is a 300hp crate 360 magnum, compression is 9:0.1 i run 91 octane fuel i live 4000 feet above sea level. My initial timing is 15 degrees and total timing is 33 degrees and i have another 10 degrees of timing added to idle from vaccum advance on manifold vaccum, so accually have 25 degrees timing at idle. I have a crane cams hi-6 cd ignition and a crane cams lx91 coil and i'm running champion rc12yc plugs and i have all my plugs indexed. Crane says .045 is a good gap to run with a good ignition, so when i installed it i gapped up to .045 from .035 and didnt have any misses thru out the rpm range.
A guy i work with said he runs a .060 gap in his small block 350 chevy with a mallory hyfire cd ignition, he told me to go up .5 in gap size untill i have a miss and then back down .5 and run that as my gap, so i gapped my plugs to .050 from .045 and still dont have a miss. But i am skeptical in going any larger then .050, in fact i was skeptical even going to .050. But as far as i can tell i dont have any misses. So my question is can a cd ignition light off a .050 gap with no problem? Or should i go back down to .045 just to be safe? or should i keep going up in gap size untill i get a miss and then back it down? What do you guys run for gaps that are running cd ignitions and hei ignitions?