Win AA hulls

[7 loader]

I am using 2 3/4 win aa hulls. Why is it that the gray hulls and the red hulls do not load the same with #4. this load has gotten me great birds out to 40 yds. the gray will not crimp with out screwing up the mid section of the gray hulls with dents.

[Canvsbk]

There's 3 different gray hulls with 2 different base wads. You need to be more specific.
Maybe I can help.

[7 loader]

I did not know this. I picked them up at a range, about 15. It looks like the same base as the red AAs. I believe this is called compression formed but not sure with the grays. Thanks.