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AR15.COM
5/4/2008 7:13:12 PM EDT
I was shooting some handloads through my pretty much stock springfield mil-spec 1911 and was getting some doubles. The handloads were quite a bit softer than regular 230gr WWB or blazer, which I have never gotten doubles with. I didn't have a chance to go run a box of regular ammo through it to see if it was the ammo, but is that common?

Jess
5/4/2008 7:19:31 PM EDT
[#1]
Is it a series 70?

I think that I've heard about the firing pin getting dirty and jamming forward, causing slam fires.
The seires 80's have a spring on the firing pin to keep it pushed back after each shot.

I could be wrong, but this is my thought.
5/4/2008 8:30:39 PM EDT
[#2]
test your hammer hook engagement by dropping the slide on an empty chamber.  (yes--it's bad to do this a lot, but it will tell you if you have a problem)

If the hammer follows, you'll probably need to replace the hammer/sear.  



(70 and 80 series pistols have springs on the firing pin.)
5/5/2008 2:13:35 AM EDT
[#3]
My 1911 has a return spring on the firing pin.

If its hammer/sear wear why does it only do it once?  Why not till the pistol is empty?

Try making a conscious effort to hold the trigger back after each shot, until you're back on target and getting ready to make the next shot.  This sometimes happens with semi auto rifles when folks are trying to learn new methods of firing the shot.

The difference in recoil may be contributing to it based on how you hold the pistol and pull the trigger.

Good luck.
5/5/2008 2:52:50 AM EDT
[#4]
It could be the sear. I had a smith do a trigger job on a Gold Cup many years ago and he took too much off the sear. It would double when it wanted and didn't do it every time.

Very dangerous situation. Good luck finding the cause.
5/5/2008 1:33:33 PM EDT
[#5]

Quoted:
test your hammer hook engagement by dropping the slide on an empty chamber.  (yes--it's bad to do this a lot, but it will tell you if you have a problem)

If the hammer follows, you'll probably need to replace the hammer/sear.  



(70 and 80 series pistols have springs on the firing pin.)


That's not a very reliable test. Hold 'em just right and damed near any 1911 will follow when the slide is dropped on an empty chamber..

Get the gun to a gunsmith.
5/5/2008 1:47:56 PM EDT
[#6]
The internet has all sorts of advice!

Some good, some bad, some stupid.
Be careful whose advice you take.
5/5/2008 1:54:08 PM EDT
[#7]
It could be the disconnector binding on the sear.

It could be insufficient spring tension on the sear or disconnector.

It could be improper geometry on the sear / hammer engagement surfaces.

If I were you, I'd let the guys with liability insurance figure this one out.  The safest course would be to let Springfield take a look at it.  
5/5/2008 2:00:06 PM EDT
[#8]
For the pistol to 'double' or go 'fullotta' the half-cock notch or shelf of the hammer is not functioning.
The above suggestions do not address this key issue.
5/5/2008 2:05:53 PM EDT
[#9]
Couldn't the sear be "bumped" out far enough to miss the half-cock notch?
5/5/2008 2:10:38 PM EDT
[#10]
While some issues are user fixable, some issues should be left to qualified Smiths. This issue belongs in the later category IMHO.
5/5/2008 2:13:13 PM EDT
[#11]

Quoted:
While some issues are user fixable, some issues should be left to qualified Smiths. This issue belongs in the later category IMHO.


Yep, I'd much rather have the gun rip through a whole mag of ammo on Springfield's range instead of mine... I don't think my range manager would be too thrilled with that event.