March 27, 2020


A Ruger SP is likely in my future. I learned of a series of books called IBOK’s ( Iowegan’s Books of Knowledge). They used to be available for. Introduction. The Ruger SP is a great revolver, but the factory double action trigger pull can be heavy and a bit rough. It can be improved with a “trigger job”. In the library they have DIY tutorials for Ruger revolvers called the “Iowegian book of Knowledge” (IBOK). They’re pretty informational and have.

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Ruger SP101 IBOK

Apply a drop of oil to the plunger. Use a tool to push the firing pin all the way forward. Its robust design evolved from the older Security-Six series. If you detect a bind, try to isolate it by watching the trigger move inside the struts.

They create excessive wear to the edges of the rifling and have the same effect as firing thousands of rounds euger ammunition. You need to be a member in order to leave a comment. The straight edge of the strut goes up. The assembly is held in the frame by a spring-loaded plunger part The GP has a larger frame, thicker cylinder, improved grip mounting system, trigger return spring, front sight, internal cylinder retainer, and trigger guard latch. The strange thing about this is that for the last 40 years Ruger could have improved the trigger action on their revolvers, but they have not done so.


The hammer dog plunger part 5 and spring part 4 will fall out. If any of you have iok, please email me a copy. The firing pin is secured by a recoil plate part 31 and held in place by a recoil plate cross pin part I have read and reread ihok article to become as familiar as possible with the gun.

Be sure to apply a coating of oil or grease to the shim. Pull the crane part 51 out of the cylinder.

An excessively premature carry-up can cause a trigger pull gag near the end of the trigger stroke. The stronger the spring, the heavier both SA and DA trigger pull will be. That was the reason that I kept searching. Thanks for listening to my whining, any help would be truly appreciated. You should be able to move the trigger from stop to stop with no binding or dragging. Apply a few drops of oil along the hammer spring.


Ruger GP Spring Kit – Gunsmithing & Troubleshooting –

Push the ejector rod in all the way. Insert the crane into the cylinder hole until it fully seats. Cylinder latch is released and pops up to ride on the cylinder. Inspect the inside of the frame.

Pull the ejector rod part 11 out of the cylinder. The sear is designed to hold the hammer cocked in the Guger mode.

Lay the disassembly pin in the slot at the bottom of the left side. Shims Hammer shims and trigger shims will center the hammer and trigger in the frame and prevent dragging.

Sorry for the Q, but what is an IBOK?

The latch should drop then pop back up and drag on the cylinder. If all chambers pass this test, the iobk is within specifications. This forum thread talks some about it, as well as lists emails he used to take orders. Subtract the last measurement from the first one.