Here is what I did when my Parker was choked tight full and tight mod.
I loaded the old way using card and fiber wads and as able to get a mod and Imp cyl.
I then made a spreader using 2 over shot cards each cut almost in half and inserted into each other to form an X. After loading the shot between the X petals, my patterns indicated Imp Cyl and a very light Imp Cyl.

Jim