If you are going to cut off the petals of a Winchester AA 28 guage wad, don't get the red ones. For some reason, they are too thick to get down the bore of .50 caliber gun. The pink ones work fine - but not as good as the MMP sub-base. The MMP was made specifically for this purpose andhas a dome shaped front that matches up very well with the concave rear of most sabots - or, in my case, the concave base of a 410 gr. Hornady Great Plains lead conical.