Just picked some valuable information on the new 20 and 28 powder Winchester came out with. It's called Winchester 572 and checking the load data on 20 gauge it looks impressive regarding the variety of the wads and hulls they tested that have some pretty safe pressure numbers. You may want to take a look at it...even better news this powder has some availability--just purchased a 4 # keg. The bad news it also works well for 9 MM which would make it scarce once the pistol guys figure that out.Thanks for the explanation. I shoot tubed guns 99% of the time and am careful to pick load recipes that keeps the pressure down.
Thanks for the info