Fordyce Beals Posted April 18, 2017 Share Posted April 18, 2017 Some one smarter then I told me that light primer strikes can be caused by: "You might try cleaning the bolt first but usually it is the firing pin slot in the bolt. " I am asking the wire how to implement a repair. The lever moves the bolt open and closed and at the same time retracts the one piece firing pin so the advice above would seem to say that a burr or divot gets pushed in to the bolt in the "firing pin slot" and causes energy in the firing pin to dissipate before the primer is hit. So it would seem that if I remove any burr or divot in the slot I would be back to the previous one trigger pull one shot fired? Please impart some group knowledge to this thread. Thank You Fordyce Beals Link to comment Share on other sites More sharing options...
The Original Lumpy Gritz Posted April 18, 2017 Share Posted April 18, 2017 Take the bolt out-When you shake it. Can you hear/see the FP move back and forth? If you can, you're GTG. With the 1 piece FP installed. I'd be look'n at a weakened hammer spring as a cause of the FTF. You can shim the hammer spring with a couple of #8 flat washers. Also-Be sure the trigger is not hitting the half cock notch of the hammer. OLG Link to comment Share on other sites More sharing options...
Fordyce Beals Posted April 18, 2017 Author Share Posted April 18, 2017 The Original Lumpy Gritz Both of the first two conditions you suggest were implemented with out the desired result. I'll take a look at the trigger/half cock notch clearance. Thank you. Fordyce Link to comment Share on other sites More sharing options...
The Original Lumpy Gritz Posted April 18, 2017 Share Posted April 18, 2017 What hammer spring do you have installed? Do you have this FTF with factory ammo? Could the issue be from primers not seated to the bottom of the cases cup. What make of primers? OLG Link to comment Share on other sites More sharing options...
Fordyce Beals Posted April 18, 2017 Author Share Posted April 18, 2017 I got the one piece firing pin and spring kit from Longhunter Shooting Supply. Added a second washer to no improvement. What is this factory ammo you speak of? Only 777 powder and D. Blake 20 to 1 bullets reloaded on the 650 are provided to Leia (wife). I load standing up with the strong mount and can pop the case rim off when seating the primer if I add more force and have Leia inspect all ammo for high primers so I don't think that's the issue. Federal small pistol magnum match primer Link to comment Share on other sites More sharing options...
Rio Brazos Kid Posted April 18, 2017 Share Posted April 18, 2017 Sounding more and more like a headspace problem. Have that checked by a competent gunsmith, and do whatever is indicated. RBK Link to comment Share on other sites More sharing options...
The Original Lumpy Gritz Posted April 18, 2017 Share Posted April 18, 2017 Yes, ck HS. Put a EMPTY sized(unprimed)case in the chamber. Close the action. See how much you can move the bolt back and forth with with your fingers with the action closed and hammer cocked. You should not have more than about .005" total movement. What is this rifles caliber? I still say the hammer spring is the most likly deal. Especially if aftermarket. OLG Link to comment Share on other sites More sharing options...
Mink Shoals Bandit, #49388 Posted April 18, 2017 Share Posted April 18, 2017 Is this a new problem since you put the new parts in, or slowly developed over time ?? Link to comment Share on other sites More sharing options...
Fordyce Beals Posted April 18, 2017 Author Share Posted April 18, 2017 5 minutes ago, Mink Shoals Bandit, #49388 said: Is this a new problem since you put the new parts in, or slowly developed over time ?? years of use, new problem Link to comment Share on other sites More sharing options...
Fordyce Beals Posted April 18, 2017 Author Share Posted April 18, 2017 7 minutes ago, The Original Lumpy Gritz said: What is this rifles caliber? I still say the hammer spring is the most likly deal. Especially if aftermarket. OLG .32 H&R Magnum Link to comment Share on other sites More sharing options...
The Original Lumpy Gritz Posted April 18, 2017 Share Posted April 18, 2017 If you have another M/94 that is a known shooter. Switch out hammer springs and see what's, what. OLG Link to comment Share on other sites More sharing options...
Mink Shoals Bandit, #49388 Posted April 18, 2017 Share Posted April 18, 2017 I would change the main spring and check the pin bore for an obstruction and also the pin for protrusion..... Link to comment Share on other sites More sharing options...
Warden Callaway Posted April 18, 2017 Share Posted April 18, 2017 I had this happen with my old 1894 made in 1900. Turned out the firing pin was broken. The tip was still in bolt so it looked ok. Link to comment Share on other sites More sharing options...
Yusta B. Posted April 18, 2017 Share Posted April 18, 2017 If you have verniers you can get an estimate of head space by measuring the length of an empty case, seat a primer half way in, chamber the round, eject the case & measure OAL. Subtract the original case measurement & that will give you a rough HS. Link to comment Share on other sites More sharing options...
Larsen E. Pettifogger, SASS #32933 Posted April 18, 2017 Share Posted April 18, 2017 If you have a one piece firing pin and it is sticking in the bolt remove it and clean it. While it is out of the bolt if there is any damage it should be obvious. If the rifle has been working for years and this just started then something is broke or dity. Link to comment Share on other sites More sharing options...
Cheyenne Culpepper 32827 Posted April 18, 2017 Share Posted April 18, 2017 maybe her timing is off,,,, as in starting to lever as she pulls the trigger,,, I get that once in a while.... Link to comment Share on other sites More sharing options...
Ace_of_Hearts Posted April 19, 2017 Share Posted April 19, 2017 Before you start changing things around and looking for a problem that isn't there....... The loads we shoot produce a lot of blow back or soot. Remove the bolt from the gun and allow the firing pin to hang vertically and observe the protrusion from the bolt. Remove the firing pin from the bolt and THOROUGHLY clean the inside of the bolt. (assuming you didn't find a broken or worn firing pin) Pay close attention to the shoulder that stops the pin from going forward. When you drop the pin back in you should see an increase in the pin protrusion from the bolt. Your second point of failure would be a weakening hammer spring. I recommend an adjustable hammer spring by Palo Verdi available from any number of sources. Link to comment Share on other sites More sharing options...
Boggus Deal #64218 Posted April 19, 2017 Share Posted April 19, 2017 I had a Marlin spring go bad in a match years ago. It was an old, light spring and finally wore out. Link to comment Share on other sites More sharing options...
The Original Lumpy Gritz Posted April 19, 2017 Share Posted April 19, 2017 2 hours ago, Boggus Deal #64218 said: I had a Marlin spring go bad in a match years ago. It was an old, light spring and finally wore out. I had the same deal happen a couple of months ago. New hammer spring, and all is good again. OLG Link to comment Share on other sites More sharing options...
Fordyce Beals Posted April 19, 2017 Author Share Posted April 19, 2017 19 hours ago, Mink Shoals Bandit, #49388 said: I would change the main spring and check the pin bore for an obstruction and also the pin for protrusion..... 14 hours ago, Ace_of_Hearts said: . Remove the firing pin from the bolt and THOROUGHLY clean the inside of the bolt. (assuming you didn't find a broken or worn firing pin) Pay close attention to the shoulder that stops the pin from going forward. When you drop the pin back in you should see an increase in the pin protrusion from the bolt. . I recommend an adjustable hammer spring by Palo Verdi available from any number of sources. These two suggestions were part of the original smarter guy advice and Lumpy's ideas. 17 hours ago, Cheyenne Culpepper 32827 said: maybe her timing is off,,,, as in starting to lever as she pulls the trigger,,, I get that once in a while.... No, I told Leia to try to recock the hammer before jacking the failed to fire shell out and they still failed to fire. Putting the failed to fire shell in on of her Ruger Single Sixes they can be made to fire. 120 rounds at Kings River had 2 fail to fire. 18 hours ago, Yusta B. said: If you have verniers you can get an estimate of head space by measuring the length of an empty case, seat a primer half way in, chamber the round, eject the case & measure OAL. Subtract the original case measurement & that will give you a rough HS. This shows Yusta B. knows the practical definition of head space, Great idea. I'll try it because it is so easy! I down loaded the SAAMI drawing for reference. I plan to work on the gun and implement some repairs and will post back the results. Thanks to every one. Link to comment Share on other sites More sharing options...
The Original Lumpy Gritz Posted April 19, 2017 Share Posted April 19, 2017 You'll get the same deal with pop'n just a primer in a case. Just measure how far it backs out. OLG Link to comment Share on other sites More sharing options...
Cowboy Rick, SASS #49739L Posted April 21, 2017 Share Posted April 21, 2017 My wife gets light hits when she gets her thumb in the way and slightly retards the hammer fall. Swears it's not her, but nobody else can repeat the phenomenon. Something is slowing the hammer fall, probably a weak spring or dirty firing pin. CR Link to comment Share on other sites More sharing options...
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