Concentrator wads

[tbrwlf]

Does anyone know about concentrator wads. A shooting/hunting friend uses them for long distance on geese. They are amazing but I really don't know much about them.

What are they?
Where can you get them for 12 and 20 gauges?
Anything special when loading them?

Thanks for any help.

 

[sportingman]

I think I have some of what you are looking for. Let me look tomorrow, and will let you know what I have

 

[sportingman]

going to try and post these picts for you

http://imageshack.us/g/69/alexshellbox003.jpg/