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I have never thought to use cushion wads without lube so I can't comment on pattern. The theory as handed down to me, is that it not only stops shot deformation, but also softens the fouling, which...

If you have longer forcing cones you may pattern better/ prevent blow by by increasing wad diameter used

Just a quick drain-dump of what I think I know:
Old wool felt jackets and hats can be found at op-shops and normally come 1/8" - 3/8" think And a good coat will last quite a while!
My lube is a...