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1911 Firing OAL

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Jon Eulette
Froneck
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Rodger Barthlow
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Post by Rodger Barthlow Thu Mar 09, 2023 4:37 pm

Getting some failure to fire rounds in my 1911 Ball gun.
What is the minimum length for a 1911 45 firing pin?
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Post by DA/SA Thu Mar 09, 2023 4:45 pm

1911 Firing OAL  GGOCfLT

Have you made sure that the firing pin channel is clean and free from any lube?

Has the mainspring been replaced lately?
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Post by Rodger Barthlow Thu Mar 09, 2023 5:52 pm

DA/SA wrote:1911 Firing OAL  GGOCfLT

Have you made sure that the firing pin channel is clean and free from any lube?

Has the mainspring been replaced lately?
Yes I have. I'm thinking the firing pin might be a light weight titanium pin and is too short.
   Hammer spring is a new !SMI
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Post by Froneck Thu Mar 09, 2023 9:26 pm

What brand of primers are you using?

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Post by Jon Eulette Thu Mar 09, 2023 9:56 pm

I bought a batch of 19# ISMI springs that were actually 17#. Caused some problems until I figured it out/measured them.
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Post by Merick Thu Mar 09, 2023 10:12 pm

Springfield titanium firing pins are notorious for causing this problem.

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Post by Froneck Fri Mar 10, 2023 9:22 am

Firing pins do not protrude out when the hammer side if pushed flush with the firing pin stop/retainer. It uses inertia to continue into the primer so light titanium firing pin combined with "hard" primers like CCI might cause the problem. "Soft" primers like Federal might help.


Last edited by Froneck on Fri Mar 10, 2023 11:43 am; edited 1 time in total

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Post by Rodger Barthlow Fri Mar 10, 2023 10:09 am

Jon Eulette wrote:I bought a batch of 19# ISMI springs that were actually 17#. Caused some problems until I figured it out/measured them.
Jon
How did you measure them? been thinking of getting some wolf springs to replace the ISMI. I have never had a problem wolf no matter the brand of primers. The primers used were Federal GM.
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Post by Rodger Barthlow Fri Mar 10, 2023 10:41 am

Merick wrote:Springfield titanium firing pins are notorious for causing this problem.
Don't know which brand firing pin since it was in the pistol when I bought it. My problems didn't start till I put a new 19# spring in. I usually get 22# springs and clip a coil or 2 off till I get the desired firing pin dent in the primer, then I close the end of the spring the old school way. 
I guess I'm getting lazy in my old age.
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Post by jglenn21 Fri Mar 10, 2023 2:54 pm

I shoot 19# wolff main springs in all my pistols without issue. I do prefer ismi recoil springs. Go figure
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Post by Rodger Barthlow Fri Mar 10, 2023 10:45 pm

I have an old war horse 1911 purchased through the department of DCM back in the 1960s so I pulled the firing pen to compare with the one in my ball gun that I'm having light hits with. 
They both are fairly close in overall length and diameter, but the weight is 6grs difference.
The pin in question is lighter.
Can 6grs make a difference in light hits on primers?
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Post by Froneck Sat Mar 11, 2023 10:02 am

The firing pin being inertia driven into the primer depends on the weight of the pin and the amount of firing spring weight counter acting so weight does make a difference.

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Post by troystaten Sun Mar 12, 2023 12:13 am

Just curious, other than more expensive what would be the advantage of a titanium firing pin?

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Post by Merick Sun Mar 12, 2023 12:40 am

troystaten wrote:Just curious, other than more expensive what would be the advantage of a titanium firing pin?
I think it was a way to pass some states' drop saftey testing without a series 80 mechanism.

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Post by Wobbley Sun Mar 12, 2023 12:41 am

They’re a thing for run and gun. Some guys shoot heavy (too heavy) loads and they use extra heavy springs.  Titanium firing pins don’t have the mass to get enough energy to pop a primer when a super heavy spring slams the slide home.
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