Here are a couple of tips that will hopefully help you and others along.
1 - Cold grease will kill a tuned revo action.
2 - The firing pin should stick out about .050, the thickness of a dime. If you can't measure it exactly, have the hammer in fired position and slide a dime up next to the protruding firing pin for a visual reference. On a newer pin in frame gun, if too short, you can buy a longer pin and put that in.
On an older pin on hammer gun, you can take the pin (hammer nose) off, grind some off the hammer face with belt or disc sander, keeping all original angles and put the pin back on. The firing pin will stick out further by the amount ground off the hammer face. Make sure that the firing pin is now not contacting the hammer nose bushing by checking for a bit of play in the fired position. If there's no wiggle, you will need to file some relief on the curved parts of the hammer nose for clearance.
3 - Use blue #242 or purple #222 Loctite on the strain screw. If you don't, it will walk out a little at a time as the spring flexes, as you have seen.
4 - For a snappier trigger return, polish and radius the square corner of the hammer seat on the top of the rebound slide. Also, polish and radius the mating rebound seat on the bottom of the hammer. This will often allow you to use a lighter rebound spring, thus giving a lighter DA trigger pull.
5 - The Wilson spring will give you the best trigger pull for a given spring weight on a factory hammer due to the length and shape of the spring. Use that one if it will work.
6 - A bobbed hammer will give a lighter reliable trigger pull than a spur hammer. This is because of the formula referenced above. The bobbed hammer (less weight) will have more velocity at a given mainspring setting and the velocity is squared, making it the more important part of the equation in this case.
7 - The top corners of the trigger is the part that eats your trigger finger when doing a lot of DA shooting. Make a big radius on those top corners right under the frame, and all along both sides. Then you can shoot comfortably all day, long match, long practice session, etc.
|