Patterning work can easily turn into a significant investment of time, but it will tell confirm or deny your suspicions about particular loads. There are plenty of "Ah Ha!" moments along the way.
Red Label:
I've had great success loading STS/Nitro/Gun Clubs with 7/8 oz hard 8.5, Tightwad, Cheddite primers, and most listed wads. My most used load is with the CB clone of the TGT12 and the data for 1,300 fps with Winchester primers. I've not patterned with the CB 4100-12, a clone of the Windjammer 8 petal wad scaled for 7/8 oz, but it seems to powder more birds. The listed pressures with this wad are extraordinarily low, but still seem to cycle my H368s, at least in spring, summer and fall. For reference, I find the H368s not quite as amenable to light loads as the Beretta 391, but close.