Good time for another update if you have it please, huntinaz.
I haven't done much loading yet, but did find the 220gr Underwood load to be accurate and still pleasant to shoot. Advertised 1200fps. I'm getting pretty consistent 50-70 fps less than advertised with factory loads in 180, 200, and 220 grain slugs in my 4.2" Match Champion. Reliable load info is indeed still scarce for the heavies.
