OK, I found this: http://www.switchbarrel.com/Spring.htm
Does that sound right?With the firing pin spring removed, you can check firing pin protrusion by dropping the pin into the bolt body and measuring protrusion with a caliper or depth micrometer. Protrusion should be .05-.062 inch. To adjust, move the lockwasher up the pin and turn the stop nut to increase or decrease protrusion. Make sure the teeth at the back of the nut line up with the teeth on the lock washer. When the spring is installed it will keep the lock washer pushed against the stop nut.
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