Cases get stuck in a sizer due to one thing; failure to properly lube the outside.
I gave OneShot one shot; emptied the can and tossed it; it cost a lot and added exactly nothing to my loading method. I normally apply a VERY THIN coat of Imperial or Unique (or a few other subsitutes) with the tips of my left thumb and fingers when I pick up each case for sizing. Lubing that way is clean, it takes takes virtually no time and I KNOW I've lubed the entire surface of every case so nothing sticks. I just wipe my fingers with a paper towel afterwards and I'm done.
