I am having a problem with dished crimps on my 366. I was using 17.5 grains of clays with a waa12sl wads and 1 oz of shot in an AA hull. I had the machine dialed in a was getting very nice looking crimps. I have changed this load over to 18.0 grains of red dot and I started getting dished crimps. I have lowered the wad seating pressure to the lowest it will go and I have tried deepening the crimp and tried backing off the crimp. When I deepened the crimp, they look better and I am only getting a dished crimp on about 1/3 of the shells. My next thought was to try to shorten the rod that seats the wads to try to lower the seating pressure even further, but this seems pretty extreme. Has anyone else seen this issue and had and success in getting better looking crimps?