There is a wimpy little clip. Anything over 45 grains seems to release it. Most people use a rubber band or strap. Some develop a habit of slapping it back up each time it drops. The originals did this and the reproductions faithfully do this as well.
All you have to do is file a little flat spot on top of the spring clip and the lever won't drop even with 60 grain loads.
You do know you can search for things on the internet, right?Picture would really be nice pointing to the proper area.
You do know you can search for things on the internet, right?