If I had a cylinder bore, I would try the Skychief load.
If I had a choked bore, either modern standard or jug, I would use a normal shot column.
If that load didn't give me what I wanted, I'd resort to standard column using a hard card over
the powder, then a plastic shot wad, then thin "B" overshot card.
I would never use the Skychief load in a choked gun. They usually need no special wadding to shoot
like champs & better than modern guns, per choke designation. Adjust shot and powder charges and that's
about it. As to a wad column, one made of a steel shot plastic wad would likely make more tightly patterns
than a soft plastic (petals) lead wad column.
For non-choked guns, ie: cylinder bore guns, using thin "B" overshot wads, 2 or 3 of them, between the powder
and shot, then one over the shot might work better than any other system of wads. This worked amazingly well
in a cylinder bore 11 gauge cap lock, on load that I used at one rendezvous. I won the trap shoot with that gun
shooting against hammer ctg. guns with chokes.