I tried them and didn't see any difference with the loads I use. I used the Circle Fly Wads. 510" Dia, 1/8" nitro cards. I tried them in my 1:48 and 1:66 barrels and there wasn't any difference. I read some posts here where others found a improvement in accuracy but each gun or barrel is different and likes different loads, but it was something to try.
I have hundreds left over if any one wants them.
I have hundreds left over if any one wants them.