Can I use red Winchester wads with AA hulls?

Seems that I recall that the waa12's (the white ones) are shorter/have less capacity than the waa12r's (the red ones), so with the small size shot at 1oz you may not get a good crimp.

I would get the correct size wads for what you are loading.

As Rick has mentioned, there is a major difference in shot capacity of the two wads. Whereas your White Win wads are designed for 1 1/8 oz loads, the red wads can handle 1 1/2 oz shot charges. So, you would need a filler wad. The red wad can certainly handle 22 grains of Unique, but why mess with a fiber filler wad or 20 gauge nitro cards to take up the space? Get the wad YOU WANT.