by phrygianradar » 24 Aug 2013 22:58
One thing that helped me get the feel for these types of pins (in the American locks) is to pull out the cylinder using a plug follower, and then start with only a few of the pins. I started with three pins; one regular driver (which you should be able to find in an American lock, but sometimes not...) and then two, either serrated or "spoorated", pins. Once I got the feel for their subtleties I built up to four and five. Even when you know how it is pinned, they can be tough, so just keep at it.
Like the others said, medium tension, and I have to mention that my life changed when I started using a top of the keyway wrench on these locks, like a Peterson Prybar. There is so much spring tension on the cam I would have it picked and not know that it was picked because I was using too little tension from the bottom of the plug. One day I got to where I thought all the pins were set and it still wouldn't open?! I had a bottom of the keyway wrench in it. I just put more torc on the wrench and it popped open! I am not saying that is what is happening for you, it was just something that I experienced in my working with American Locks.
Good pickin'!