Ace Hanlon Posted April 10, 2023 Share Posted April 10, 2023 Has anyone installed a main spring tension screw on a 1866 rifle? If yes, what problems were encountered. Thanks Ace Link to comment Share on other sites More sharing options...
Silver Sam, SASS #34718L Posted April 10, 2023 Share Posted April 10, 2023 I have done it a couple of times.... Had no problems, there is plenty of meat on the lower tang where the screw needs to go Just a simple drill & tap and installed a short allen screw.... EazyPeazy! Link to comment Share on other sites More sharing options...
Ace Hanlon Posted April 10, 2023 Author Share Posted April 10, 2023 38 minutes ago, Silver Sam, SASS #34718L said: I have done it a couple of times.... Had no problems, there is plenty of meat on the lower tang where the screw needs to go Just a simple drill & tap and installed a short allen screw.... EazyPeazy! Sam, did you install the tension screw in the same place as in a 73? Ace Link to comment Share on other sites More sharing options...
Silver Sam, SASS #34718L Posted April 10, 2023 Share Posted April 10, 2023 2 minutes ago, Ace Hanlon said: Sam, did you install the tension screw in the same place as in a 73? Ace Yes. Link to comment Share on other sites More sharing options...
Prairie Dawg, SASS #50329 Posted April 10, 2023 Share Posted April 10, 2023 When I have had my 66s short stroked & an action job done, I have always asked the gunsmith to install a mainspring tension screw. They are always in about the same location as on my 73s, and I have never experienced any problems. --Dawg Link to comment Share on other sites More sharing options...
Ace Hanlon Posted April 11, 2023 Author Share Posted April 11, 2023 Job done and thanks Sam and Dawg! Ace Link to comment Share on other sites More sharing options...
Colorado Coffinmaker Posted April 11, 2023 Share Posted April 11, 2023 Too late so Never Mind Link to comment Share on other sites More sharing options...
Mysterious Stranger Posted April 12, 2023 Share Posted April 12, 2023 What does that newly installed screw actually do? (Forgive my ignorance on this - I know almost nothing about the 1873 innards). Link to comment Share on other sites More sharing options...
Sixgun Seamus Posted April 12, 2023 Share Posted April 12, 2023 7 hours ago, Mysterious Stranger said: What does that newly installed screw actually do? (Forgive my ignorance on this - I know almost nothing about the 1873 innards). It allows you to increase pressure on the mainspring in the event of light strikes. Link to comment Share on other sites More sharing options...
Mysterious Stranger Posted April 12, 2023 Share Posted April 12, 2023 1 hour ago, Sixgun Seamus said: It allows you to increase pressure on the mainspring in the event of light strikes. Ah, ok. Does it affect trigger pull weight though as well? Link to comment Share on other sites More sharing options...
Goody, SASS #26190 Posted April 12, 2023 Share Posted April 12, 2023 Would this be considered as an external modification? Link to comment Share on other sites More sharing options...
Sixgun Seamus Posted April 12, 2023 Share Posted April 12, 2023 17 minutes ago, Mysterious Stranger said: Ah, ok. Does it affect trigger pull weight though as well? There is a separate spring for the trigger. Link to comment Share on other sites More sharing options...
Mysterious Stranger Posted April 12, 2023 Share Posted April 12, 2023 27 minutes ago, Sixgun Seamus said: There is a separate spring for the trigger. Thank-you, Seamus. Link to comment Share on other sites More sharing options...
Equanimous Phil Posted April 12, 2023 Share Posted April 12, 2023 1 hour ago, Mysterious Stranger said: Ah, ok. Does it affect trigger pull weight though as well? Basically, changing the hammer spring tension does always affect the trigger pull weight, but while you will notice a change in trigger pull when replacing the stock Uberti main spring by a light main spring, the fine adjusting of the tension screw affects the trigger pull rather theoretically. Btw, other factors for trigger pull weight are sear angle, friction (surfaces), and trigger spring. Link to comment Share on other sites More sharing options...
Mysterious Stranger Posted April 12, 2023 Share Posted April 12, 2023 1 hour ago, Equanimous Phil said: Basically, changing the hammer spring tension does always affect the trigger pull weight, but while you will notice a change in trigger pull when replacing the stock Uberti main spring by a light main spring, the fine adjusting of the tension screw affects the trigger pull rather theoretically. Btw, other factors for trigger pull weight are sear angle, friction (surfaces), and trigger spring. I am beginning to see why "tuning up" am 1873 replica rifle requires knowledge and experience. Link to comment Share on other sites More sharing options...
Abilene, SASS # 27489 Posted April 12, 2023 Share Posted April 12, 2023 3 hours ago, Goody, SASS #26190 said: Would this be considered as an external modification? I'm thinking mostly not visible with the action closed. Link to comment Share on other sites More sharing options...
Equanimous Phil Posted April 12, 2023 Share Posted April 12, 2023 44 minutes ago, Mysterious Stranger said: I am beginning to see why "tuning up" am 1873 replica rifle requires knowledge and experience. Most important thing is to know what to touch and what to leave to your gunsmith Easy things to do yourself if you buy a stock Uberti: replace springs (hammer, lifter, lever, trigger safety block, magazine), magazine follower, soft screws by hardened ones, and polish carrier, lifter arm, and lever a bit (good videos on youtube) Link to comment Share on other sites More sharing options...
Goody, SASS #26190 Posted April 13, 2023 Share Posted April 13, 2023 21 hours ago, Abilene, SASS # 27489 said: I'm thinking mostly not visible with the action closed. That's a thought. Link to comment Share on other sites More sharing options...
Colorado Coffinmaker Posted April 13, 2023 Share Posted April 13, 2023 I usually did this job on the 1866 and the Henry with a #8 Set Screw. Drill, Tap, Install. Once the screw is threaded in place it isn't visible at all except for the hole in the bottom of the lower tang. Link to comment Share on other sites More sharing options...
Springfield Slim SASS #24733 Posted April 17, 2023 Share Posted April 17, 2023 Older 1866's came with the screw, so I don't see how it could be dis-allowed. JMHO Link to comment Share on other sites More sharing options...
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