Has there been a report on the advantages/disadvantages of 8 pedal vs 4 pedal wads?
I’ve not seen any reliable report which was backed up by competent testing that showed there to be a consistent difference between eight petal and four petal wads. I’ve seen individual comments that the eight petal wads produced both more open and tighter patterns. In theory, the eight petals should open slightly faster than the heavier and stiffer four petals, but I don’t know if the theoretical difference is practical.
I can’t think of any major shell manufacturer who uses an eight petal wad. That might be because they are touchier to load because the petals are less rigid and are more likely to be bent by the wad ram.
Like you, I’d like to see the results of proper testing. Until then, I’ll remain sceptical of any meaningful difference.
Shotgun Report’s Technoid