Mike
I wouldn't use them in a nice game gun but a good strong pigeon gun with opened up chokes, no worries. i wouldn't do it in a tightly choked Pigeon gun.

I shot heaps of Breneke's when I first came to Australia - good pig killers !!! - out of a WW Greener Shotgun - which between that and shooting ducks with ICIL'S made the gun loose.