I hardly ever use man gain on the 330, 777, 737 or 744. We were taught from day 1 what maui said above and I agree with him.
That's not to say I don't switch to man every now and then when the situation warrants further investigation. Including using low gain in high rainfall areas whilst down low in the Terminal area.
Constant use of tilt and range is a must.
I very rarely see the FO or SO with 320 nm range and 1 down tilt on a dark night over the Pacific anymore, but I used to.
