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. I bought a new SP a few days ago, did the IBOK action smoothing, and then decided to try giving it a mirror polish. I have a lot of experience. Post subject: SP mods. Post . He re-did the IBOK, removed the offending schematic and added LOTS more pics and now he charges for it.

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Put a drop of gun oil on the end of the crane tube and another drop on each ball bearing. The edges of the shim should be sanded smooth. Transfer bar, hammer and s1p01 pin relationship: Wed Aug 11, 7: Yes, my password is: Late carry-up could allow the gun to fire before the cylinder is locked.

Most of the parts are contained by push-out pins or spring-loaded plungers and a mere 3 screws. Nov 24, 1.

The SP Club – Page 24

Put your thumbnail in the sight notch and pull the sight blade to the left ibo, spring tension until the right side pops up and releases from the captive windage screw. Ruger engineers did an excellent job designing the GP I dressed most of the mating surfaces and I must say that even without shimming and spring replacement the action has improved significantly. Got a replacement from Ruger, still haven’ found the originals a year later.


This will give an indication on how deep the Range Rod has been inserted when testing. If the pin is flush and the latch operates smoothly, there is no need to remove the latch. When the cylinder is closed and latched, the rear of the cylinder is secured by the center pin rod in the hole of the frame under tension of the ejector spring.

It is around 12 degrees here so it may be a xp101 too. The adjustable rear sights are the same as most other Ruger revolvers and are click-adjustable for both windage and elevation. I did polish up the internals as per the IBOK and installed the 10lb hammer spring.

The trigger is noticeably lighter but not too light that it gets light primer strikes. February 8th, Wed Aug 11, 8: After cleaning, insert the spring then insert the plunger with the slot up. More visible front sight. DA sear releases hammer allowing it to inok forward. High quality stainless steel shims can be bought from Lance at TriggerShims.

With the hammer fully forward, insert the hammer strut assembly in the grip frame. You can then install very light hammer springs and still get lock times just as fast as a factory spring with a factory hammer while having plenty of energy on the firing pin for reliable primer detonation. Hammer reaches the cocking point and is held to the rear by the SA sear.


I think my biggest adjustment will be trigger take up and reset. If you detect a bind, try to isolate it by watching the trigger move inside the struts. To remove the hammer strut assembly, cock the hammer then place the disassembly pin part 9 in the hole near the end of the hammer strut part The firing pin is secured by a recoil plate part 31 and held in place by a recoil plate cross pin part Ruger and I are going shooting And, I couldn’t find any.

The bore diameter is typically very uniform at.

Ruger SP101 IBOK

Look for chatter marks in the bore where the rifling is interrupted. I wont be able to try it out untill this weekend. An 11 degree reamer provides a smoother transition from throat to bore and is recommended.

If the bore is damaged, the gun must be returned to the factory for a barrel replacement.