Glad you like them, David, Old Buddy, sweet shells to shoot indeed.
Did you ever get to pattern them? I found out when I was 14, loading Eley 2 1/2" Grand Prix cases with Greenbat powder vol for vol as black powder, that low velocity shells produce the best patterns with No 7 shot. I'll try Feather weights in my Lanber O/U tomorrow. I suspect the case head might be expanding and causing the problem. Despite all the hoopla I will never shoot 2 3/4 shells in my 2 1/2 guns.
Mike

Mike