The best thing to do is to download the Winchester Reloading Manual in Adobe (.pdf) format. Here is the website:
This will help you with future reloads, but since 452AA is a discontinued powder, I perused an old reloading manual which had Winchester reloading data in it. Mind you, this information is 10 years old, and uses the old lead crusher method of measuring pressures, so it may no longer be reliable. You are on your own with these data.
A Win AA case with 19.5gr 452AA, 1 1/8 oz. shot, Win 209 primer, and Win WAA12 wad will yield a velocity of 1145 fps., and generate 9,400 lup. This load is noted as duplicating the ballistics level of the factory Winchester 2 3/4 dram eq. AA plus Target Load.
Using the same components, but increasing the powder charge to 20.5 gr. 452AA yields a velocity of 1200 fps., and a pressure of 10,100 lup. This load is noted as duplicating the ballistics level of the factory Winchester 3 dram eq. AA plus Target Load.
You may wish to contact Winchester by e-mail to see if these data are still recommended.
Hope this helps, Walt