Gun Convergence

[Whiski]

I am having a little trouble setting a proper gun convergence.

Can someone tell me the best setting for this as I seem to be missing something. I either fall short of my setting or the lead merges past the point of what I expect it to merge.

Also, is it best to have different settings for each plane? Would I need different setting for the 109 as compared to the Spit? Does the game model the physical effects of different ammo types into the setting as well?

Thanks in advance and your help is much appreciated!