I run TMO and RSRD
I have, some, one shot kills

and boy are they spectacular. I have played with depth settings and I have discovered as I think other have mentioned in separate discussions that getting a pop closer to the keel will greater your chances of getting that one shot kill.
That being said the depth setting is a bit boinked at times

and I completely miss LOL
At the shallowest setting I get a greater hit ratio but use more fish and longer sink times. Closer to the keel I get a much better fish to kill ratio and just love the ones where the keel breaks and watch as two parts of a while sink to the bottom.
I saw one actually flip the forward section in air once and then come back down facing the stern then sink ... looked cool.
Mark