I use 18.5" 21" 24" snd 28"on my pump and semis for skeet and 28" and 30" on my doubles. I like 26" tubes on o/u tho. The precieved lead is much longer on shorter barrels
In the short time I've been shooting skeet, this is something I have observed too. Thank you for bringing this up!
One thing for sure, at least for me, is try and use the same gun to develop a consistent perceived lead. I have been shooting several different shotguns and I believe it's slowing the learning curve. Once I think I get it, a change of guns tells me otherwise.
So far, a 24 is the best score - switch guns and the bottom falls out... Go back to that gun and it takes some time to 'repair' the damage
A 12ga semi with 26" barrel (sporting stock & twin beads) has been fairly consistent. Moving to a 20ga O/U with 28" barrels (field stock & twin beads) is quite different. Surprisingly, a 28ga SxS with 26" barrels (field gun with single bead) has provided good results too. 410 pump.....well, that's another story...
I like the idea of a 20ga for skeet and wonder how 30" barrels will do?
Sporting stocks seem to be an advantage - mostly for fit and sight plane.
As primarily a rifle shooter, keeping the gun moving is one of the biggest challenges which has nothing to do with the gun!!! I hope more 'ice time' will help with this. At first, I wasn't aware I was stopping the gun. Now I'm aware of it when it happens. The trick is to fix this!
Todd Bender's vids are great and there's no shortage of genuine help on-course.
A lot of very useful information has been presented here. Thanks for all the insight and experience already posted. Will look forward to more comments.
SD