I used Claybuster wads in my .410 loads for quite a while, but started having blooper problems with the Remington hulls. After a lot of frustration and head scratching, I finally measured some wads. Claybuster had changed the wad diameter from that of the Remingtons to that of the Winchesters. I gave almost a whole case of the Claybusters away, and went to Federal wads with no more problems. The Claybusters worked just fine in Winchester hulls (0ld AA). The only caution I would give about loading .410's has to do with primers. I never had any problem using WW or Rem 209's, but some brands gave high pressure in the .410 causing shot off shells. Cheddite was one of those brands.
