My MX8/Mirage is a type 2 choke system. I have measured all of the chokes and marked the results BUT shooting a few patterns show that tighter patterns seem to prevail. I shoot a #4 = mod (.24) and can break MANY 27 yard clays and use it for the first barrel on ZZ.s. I like a #1 and #2 for skeet (.13, .20)