Ive been wanting to set up a 20 ga turkey gun for a while. I recently purchased a red head blackout .575 for my Mossberg 500. I tried some fed hw 6 and fed #6 with decent results, its ported but the ports are really thin and linear so I didn't think the FC wad would be a problem, I was wondering if the HW 7s or maybe the hevishot 7 or magblends would do better. The poa/poi was low and right with both loads I tested so ordered the Williams universal slugger sights to correct it. Anybody input/suggestions would be appreciated.