I use One Shot for all my straight wall pistol cases and it works great for me. For rifle I use Hornady Unique. I have to apply it to each case when I start a session, and then every 3-5 cases after that.
If using One Shot, you must shake the can well. Then you must spray the cases well. And then you have to wait for it to dry. If you don't wait for it to dry you will get a stuck case. I usually spray it and walk away for a cup of coffee or a smoke. Ten minutes should be enough time.
chris