Win 21 Trigger Problem - 03/22/08 02:20 PM
I need help from someone that has experience with a "balking" M21 trigger. Here is the story. My 1948 vintage M21 field grade has periodically doubled (fired both barrels at once) for several years. When it happened I would tighten the screw through the tang under the trigger guard about a quarter turn or so and shoot it with no problems for 500-600 rounds. The "fix" was repeated when it doubled again. The last time this happened, the fix didn't work so I decided it was time to have someone look at it.
I took it to a well known gun shop for the work. When the gun was returned I tried it out. The work sheet said the left sear had been recut. In about 25 pair of targets, the gun doubled once with the left barrel selected to fire first, but the main thing was that now the second barrel didn't always fire when the trigger was pulled (balking - the hammer dropped with a time delay after the trigger was pulled). It happened with either barrel selected first but primarily when the left barrel was selected. And, there were two complete failures to fire with the trigger being pulled multiple times. When it balked, the gun might fire when the trigger was released after the first pull or after one or more extra trigger pulls. The first barrel always fired when it was supposed to regardless of which barrel was selected.
The gun was returned to the gun shop, more work was done (the trigger was "adjusted") and the gun was tried again yesterday on about 30 pair of targets. This time there was no doubling, but there were three balks with the left barrel selected first and three balks and four failures to fire with the right barrel selected first. This is almost the reverse of the trial after the first repair. This time most of the balks were similar in timing to a hang fire when a gun goes off a split second after the trigger is pulled and the hammer has dropped and popped the primer. The difference is that this gun fires only when the hammer drops and the hammer does not drop when the trigger is pulled. There is NO snapping of the hammer, a delay, then the gun fires. Apparently, the trigger mechanism is not cleanly selecting the second barrel.
I will be returning the gun to the shop on Monday and would appreciate some good knowledge of what's happening or what to look for to impart to the smith they have do the work.
Thanks,
Johnpe
I took it to a well known gun shop for the work. When the gun was returned I tried it out. The work sheet said the left sear had been recut. In about 25 pair of targets, the gun doubled once with the left barrel selected to fire first, but the main thing was that now the second barrel didn't always fire when the trigger was pulled (balking - the hammer dropped with a time delay after the trigger was pulled). It happened with either barrel selected first but primarily when the left barrel was selected. And, there were two complete failures to fire with the trigger being pulled multiple times. When it balked, the gun might fire when the trigger was released after the first pull or after one or more extra trigger pulls. The first barrel always fired when it was supposed to regardless of which barrel was selected.
The gun was returned to the gun shop, more work was done (the trigger was "adjusted") and the gun was tried again yesterday on about 30 pair of targets. This time there was no doubling, but there were three balks with the left barrel selected first and three balks and four failures to fire with the right barrel selected first. This is almost the reverse of the trial after the first repair. This time most of the balks were similar in timing to a hang fire when a gun goes off a split second after the trigger is pulled and the hammer has dropped and popped the primer. The difference is that this gun fires only when the hammer drops and the hammer does not drop when the trigger is pulled. There is NO snapping of the hammer, a delay, then the gun fires. Apparently, the trigger mechanism is not cleanly selecting the second barrel.
I will be returning the gun to the shop on Monday and would appreciate some good knowledge of what's happening or what to look for to impart to the smith they have do the work.
Thanks,
Johnpe