I shot 30g #6 and 30gr #5 Greencore wad last season and was really impressed
Coming away from Lyalvale Supreme Game.
They were fine but I fancied a change.
They patterned really well at 30yds in 1/2&1/4 in my side by side A&N
Most notable was the terminal effect
Birds were less often hit and gliding
Not conclusive but certainly confidence inspiring
The wad is a biodegradable and is a skirted disc
Allegedly better seal and good for backbored

verbored barrels
This season I have mostly been shooting the 30gr #6 Greencore Cup
These are in a biodegradable cup version of the same cartridge
Whilst not patterned in my most used gun (Teagued B25 B2G 1/2&3/4) they have been really good
Maybe I have just got better but they have brought down some monster birds
Still missing plenty though!!
Yes they are expensive but for the amount I go through its not the most expensive part of the day