AHA! It sounds like you have found the elusive mushroom pins. I feel so sorry for you.
Seriously, when it turns about 1/16 inch or so then stops, go in with your hook pick and feel which pin (or pins) is doing the binding. Make note of it. Then turn the cyl back to the locked position. Then raise the pins that you found binding up to shear line so they clear. Then, and only then, pick the rest of the pins. I call them mushroom pins, although they are sometimes called spool pins, and a few other names. They are shaped sort of like an hourglass. They come in slightly different shapes so that each lock manufacturer can get his own patents I presume. The principle here is that when the other pins are picked first, the cylinder will turn a little and the mushroom pins bind sideways on the narrow part. This evil invention was designed solely to wreak terror into the hearts of any who would dare to attempt to pick one of these "pick-proof" locks. Proof that no lock is truly pick proof. Take one apart and what I'm saying here will make a lot more sense. (I just had one apart so this is all fresh in my (alleged) mind) Your Handy Dandy pick gun does a real quick job of pick them BTW.
