Mod. 1912

[Sav22]

Do not use Hi-Speed!!! Make sure the cartridge guide above the bolt is dropping down to line up with the chamber when the bolt opens.

Here's a picture of a low serial number 1912 that was sent back to the factory for repair sometime after 1931 when Hi-Speed ammunition became readily available, it had a big stamp added to the side of the receiver -

"NOT DESIGNED FOR USE WITH HI-SPEED CARTRIDGES"

[wesuredo]

Hi Sav22 -
Since you're so well versed in the Mod. 1912, I'm writing to hopefully pick your brain to solve a problem with my 1912.
I took it down, cleaned, & lubed it and took it out with 5 rounds of CCI Standard Velocity ammo for a test run. It fires and ejects perfectly, but it will not re-cock the hammer and strip the next round out of the magazine. It's as if the bolt is not coming back far enough to cock the hammer and pick up the next round in the magazine. If I load one round in the magazine, it fires, ejects the empty and the bolt is held open on the empty magazine. Even though I have nothing to compare it to, everything inside looks normal. Nothing looks chipped or broken or excessively worn - ?? I'm hoping you might have some idea as to what may be causing this problem. It's a nice autoloader but not so nice single shot... Thanks.
P.M. & email sent.

[Sav22]

I am assuming from what you say that with the first round it will feed from the magazine and everything seems to function fine, it's only after firing the first round that there are problems.

Have you tried to manually work the action without firing and see if the gun will cycle more than one round that way?

If that works then try this with the gun empty or with dummy rounds (or with live rounds if in a safe location to do that) - pull the slide back 1/2 to 3/4 of the way and pull & hold the trigger (this will drop the hammer with out possibility of the firing pin damaging the rim of the chamber), then see if the slide will go fully back (keep the trigger pulled) and cock the hammer.

The only thing I can think of is that some parts are froze up and not moving properly or possibly some parts were changed with those from a slide action that although they may fit, they will not function as they should.

The interrupter parts in the trigger may not be moving correctly, or maybe bent, or the hammer maybe wrong, and with the trigger pulled the hammer is blocked, which then blocks the slide and keeps the action from fully cycling.

Here are patent drawing for comparison, note that the 1912 took a different hammer than the 1903 & 1914 that required clearance for the internal parts in the interrupter trigger.


PS - 1912 hammers do not use an action lock so they do not have the pin that released it (or the hole for one) visible on the right side - shown in the 1914 patent in the hammer just below the hammer pivot hole.

[wesuredo]

Thanks Sav22. I'll study what you sent and post findings, if any.

[Sav22]

I was going to include a link to the patent drawings and forgot, these show the parts as they were when designed, as you probably figured out from the previous post there were a lot of changes made during production - https://www.google.us/patents/US1100766

[wesuredo]

Update: Mine seems to be like the lower one in the pictures (later model), but has an earlier mag. with the nickel plated folower. Bolt, hammer, and cartridge guide are exactly as shown in the lowest action picture.
I inserted a loaded mag. and manually cycled the action. All rounds fed and extracted, and cocked the hammer each time. Next, I retracted the bolt 3/4 of the way back while holding the trigger back to release the hammer, and let the bolt go forward. Then while still holding the trigger back, pulled the bolt fully back and it would not cock the hammer and set the trigger. I can't figure out why everything is as it should be when manually cycled and fired, but not when I just chamber a round and fire it. Obviously the bolt comes back far enough to eject the fired round, but doesn't reset the hammer & trigger or feed the next round - I'm stumped and would really appreciate some opinions. It's a cute little single shot, but I want more.

[Sav22]

... and would really appreciate some opinions.

When I suggested the test, I gave a couple opinions as to what could cause the problem - I assumed something was keeping the hammer from fully cocking only when the trigger is pulled, which them would block the bolt from full travel, it's probably not much. Another thing you could try is pull the bolt back as far as it will go with the trigger pulled and while still pulling on the bolt release the trigger and see if the bolt will then move slightly and cock the hammer.

Your test gave the exact results I thought it would and what I suggested above might be causing this is that the internal parts in the interrupter trigger could be locked up and not moving, or you may have some wrong parts in it, possibly a hammer from a slide action. Try dripping some penetrating oil inside the trigger & letting it set. Could you post pictures of the inside of both halves of the receiver?

[wesuredo]

I tried the test you suggested, hammer still didn't cock. I also soaked the trigger with Kroil overnight, still no change. I'm beginning to dread having to figure out how to disassemble and inspect the trigger, but eventually will do what I must to get it working properly. I took photos of both halfs of the receiver, and as soon as I get through a computer crash, I will post them.

[wesuredo]

Well, I seem to have muddled my way through my computer problem (unlike my 1912 problem), and I've taken some pictures of both halfs of my problem child's receiver, which to my eye looks exactly like the lower of the four shots posted above. However, the Posting Permissions below is telling me I may not post attachments ?? I'd like you to see them for your evaluation. Any idea why I'm not allowed to attach pictures to my post ?