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Old 11-12-2018, 11:25 AM   #1
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147jhp in 1911 9mm

My current production Gold Cup 9mm is nose diving with Federal 147HST ammunition . I tried different magazines , recoil springs, etc. What is the usual cause of nose dive in 1911 9mm? What else can I try to do ?
 
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Old 11-12-2018, 04:20 PM   #2
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First step..... try different ammo.
Some guns just don't "like" some ammo and people often screw up a good gun when all that's needed is different ammo.

I've see people just determined that "By god, this gun is GOING to shoot THIS ammo or else".
The "Or else" is they the start altering things and wind up botching up a good gun.
I've also seen people with a gun that just wouldn't work with some ammo and instead of trying something else they get rid of the gun.
The next owner uses different ammo and has zero problems.

If you try different ammo and it still doesn't work, or if you refuse to use some other type the smart move.... Send it back to Colt to have it checked out.
They should pay for shipping both ways.

Again, all guns are individuals. What works just great in my gun may choke in yours.
There's plenty of brands and types of 9mm ammo to try.
 
Old 11-12-2018, 07:54 PM   #3
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Quote:
Originally Posted by dfariswheel View Post
First step..... try different ammo.
Some guns just don't "like" some ammo and people often screw up a good gun when all that's needed is different ammo.

I've see people just determined that "By god, this gun is GOING to shoot THIS ammo or else".
The "Or else" is they the start altering things and wind up botching up a good gun.
I've also seen people with a gun that just wouldn't work with some ammo and instead of trying something else they get rid of the gun.
The next owner uses different ammo and has zero problems.

If you try different ammo and it still doesn't work, or if you refuse to use some other type the smart move.... Send it back to Colt to have it checked out.
They should pay for shipping both ways.

Again, all guns are individuals. What works just great in my gun may choke in yours.
There's plenty of brands and types of 9mm ammo to try.
I understand.. what normally is causing nose dives with 147JHP ammo?
 
 
Old 11-13-2018, 02:52 PM   #4
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There's a number of reasons, from rough feed ramps, to the bullet shape, to the magazine lips, to the magazine follower, to the breech face, to the extractor, to the magazine spring.
It can even be off the wall things like a magazine spring in backward or upside down.

That's why it can be tough to diagnose: it can be any one or combination of things.
 
Old 11-13-2018, 08:57 PM   #5
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Quote:
Originally Posted by dfariswheel View Post
There's a number of reasons, from rough feed ramps, to the bullet shape, to the magazine lips, to the magazine follower, to the breech face, to the extractor, to the magazine spring.
It can even be off the wall things like a magazine spring in backward or upside down.

That's why it can be tough to diagnose: it can be any one or combination of things.
Which 9mm 1911 magazines are known to feed lowell with longer bullets ?
 
Old 11-29-2018, 06:25 PM   #6
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Magazine Lips

While there may be other reasons, in general whether a cartridge nose-dives into the feed ramp or stands up (live round smoke stack), the mag lips are at fault:

Tight mag lips hold the cartridge too long as the slide tries to push the cartridge forward into the chamber. It nose-dives instead of rising to the chamber.

Loose mag lips free the cartridge too early. As soon as the slide pushes the cartridge, it jumps out of the magazine and straight up.

If you have an old GI magazine, try that and squeeze or spread the lips to see the effect. If you want to use that ammo (you may have a ton of it) don't give up yet. Borrow different mags from friends to try. There are many different lip configurations. My .45s (1911 & Glock) will feed anything I've tried, including 165 grain Hydra Shok, with a variety of magazines.
 
Old 12-13-2018, 12:20 PM   #7
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If other ammo feeds fine, then how much effort do you want to get the gun to feed THIS ammo.
If everything is correct with the gun and magazine, a round that locks up on the feed ramp is generally too long. If too short, it will often jump up and jamb on the barrel/barrel hood.
A good 1911 will feed a sized empty case just fine.
Next, the 1911 is made for .45 auto/.38 Super/10mm Auto length rounds and not for short 9x19, so the magazine has to precise to feed it correctly.
Again, as above, contact Colt. Always contact manufacturer FIRST.
 
Old 12-13-2018, 03:54 PM   #8
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I used to have feed problems when I first started reloading. Then I bought pistol case gauges for each caliber I reload for to make sure my completed rounds were under the maximum dimensions. That solved a lot of the problems. The others here have great points about contacting the manufacturer for recommended dimensions/solutions, and the magazine lip tightness.
 
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