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golden24 View Drop Down
International Auto Mag
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Post Options Post Options   Thanks (0) Thanks(0)   Quote golden24 Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2020 at 10:42pm
Hi Jerry,
The 6.5" 357 barrel was delivered yesterday but I won't be able to set my eyes on it till next
week.
I am planing on taking some images when time permits.
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Pantera Mike View Drop Down
Callahan's Auto Mag
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pantera Mike Quote  Post ReplyReply Direct Link To This Post Posted: 01 Feb 2020 at 2:20am
Somewhere on YouTube there is a video showing barrel latch failure while firing. The shooter pulls the trigger, the gun fires and recoils, and then the barrel launches forward and disappears somewhere in front of the shooter.

I looked for it just now and couldn’t find it.
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TankMan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TankMan Quote  Post ReplyReply Direct Link To This Post Posted: 01 Feb 2020 at 4:59am
Originally posted by Pantera Mike Pantera Mike wrote:

Somewhere on YouTube there is a video showing barrel latch failure while firing. The shooter pulls the trigger, the gun fires and recoils, and then the barrel launches forward and disappears somewhere in front of the shooter.

I looked for it just now and couldn’t find it.


Jeeze, that's awkward. At least that's better than with a Mauser C96 if the bolt stop fails or the rear of the barrel extension cracks off. The bolt will make like a Zuni rocket coming right at the shooter's kisser....and some guys insist on using Tokarev ammo in a 100 year old pistol...

Jerry
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BEEMER1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BEEMER1 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Feb 2020 at 12:05pm
Originally posted by Pantera Mike Pantera Mike wrote:

Somewhere on YouTube there is a video showing barrel latch failure while firing. The shooter pulls the trigger, the gun fires and recoils, and then the barrel launches forward and disappears somewhere in front of the shooter.

I looked for it just now and couldn’t find it.

I have seen that video of the barrel shooting off during firing.

There was a subsequent video showing the first video in slow motion and you can see the shooter's hand bumping the barrel latch lever during recoil and unlatching it.
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Pantera Mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pantera Mike Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2020 at 12:44am
I have always believed that the rear sight on my 8.5-inch 357 barrel is bent (twisted actually) and today I decided to verify it objectively. 

I placed the barrel upside down on my kitchen counter (after verifying the counter was level) and placed a level on the frame, and the displacement was pretty apparent:




Here is what the sight picture looks like, with the front sight level. The rear slight drops a bit to the left:




I can’t see any indications of any trauma suffered by the sight assembly:






I have found I can shoot around the problem and it’s no more difficult to shoot than my other Auto Mag barrels, and is still among the most accurate pistols I own. It is weird however. I suspect the rib that the sight is attached to wasn’t properly affixed to the rear of the ’receiver’ and is slightly twisted. I don’t think the problem is the sight itself. 

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edkel1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote edkel1 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2020 at 3:41am
Mike 
That's an interesting way of looking at it.
You know that's a $8.00 to $9.00 carpenters level from home depot made in China with a tolerance of  about what your picture shows.
I suggest you have a machinist or gun smith check it out for you as the result my vary.
What I did notice on my Automags was the barrel's are sloppy with it in battery of about a 32nd of an inch and even more when not in battery.
These guns are old and were mass produced with antiquated machines that might not hold the tightest tolerances compared to modern machines.
Please post your results
Ed
" Right turn Clyde "
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TankMan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TankMan Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2020 at 5:13am
Originally posted by edkel1 edkel1 wrote:

Mike 
That's an interesting way of looking at it.
You know that's a $8.00 to $9.00 carpenters level from home depot made in China with a tolerance of  about what your picture shows.
I suggest you have a machinist or gun smith check it out for you as the result my vary.
What I did notice on my Automags was the barrel's are sloppy with it in battery of about a 32nd of an inch and even more when not in battery.
These guns are old and were mass produced with antiquated machines that might not hold the tightest tolerances compared to modern machines.
Please post your results
Ed


I don't know Ed, an old machine doesn't mean it's an inaccurate. I don't know what the Automag machinists used but I'll bet they weren't crappy machines. What mike is showing is more than a few .0001's of an inch worth of inaccuracy. Any decent machine in a production shop should be able to do better than that and a good machinist knows the weaknesses of his( or her) machines and can compensate.

Up until a a few years ago I had a 19" x 60" LeBlond Regal made in 1942 that had runout at the spindle of less than .0002". It was a brute of a machine that weighed 3800 pounds but had lovingly been maintained over the years.

Perhaps Automags just beat themselves up in firing. All the bent parts might just be part of their 'charm' . Just as long as with each pull of the trigger anything that fires from or off of the thing goes in the direction opposite the operator it's a good day...

Jerry
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Pantera Mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pantera Mike Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2020 at 5:52am
Ed,

In person, the sight tilt is obvious. It’s not just a little bit. 

When the barrel is mounted on the frame, normally the top of the sight is parallel with the top of the cocking piece. On this barrel the disparity is evident. I will try to get a pic in the next few days. 

I’m not overly inclined to try to fix it at the moment. It’s bent but not broken. Fixing it could result in breaking it. 
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edkel1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote edkel1 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2020 at 6:55am
Jerry
You are absolutely correct, but compared to today's mills, they don't hold a candle to the new stuff, 
You can't compare a machinist level to a Home Depot torpedo level.
Mike that's why I said let a machinist or gun smith check it for you, you did not show that if it was a vented barrel or a tapered one, if it is a taper I can see what your talking about.
Is that the barrel the one you bought a year or so ago for I think you said over $1500 ??????????
Ed
" Right turn Clyde "
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Pantera Mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pantera Mike Quote  Post ReplyReply Direct Link To This Post Posted: 14 Feb 2020 at 7:07am
Ed,

Yes it’s an 8.5-inch non-rib $1500 357 barrel. It shoots remarkably well, so much so that even I (a decidedly average shot) can achieve 1 to 1.25 inch groups at 25 yards. A better shot could undoubtedly do even better. 

A machinists level won’t tell you anything this cheap one isn’t already telling. The sight probably canted 2 degrees or so to the left, something completely impossible to see in isolation but very obvious when aiming the gun. But the brain is a remarkable thing and can compensate fairly easily. 

Fortunately this is my spare barrel which I rarely use. I much prefer my 6.5-inch vent rib 357 barrel, for no reason I can articulate. It gives up about 200 FPS versus the longer non-rib barrel. But the paper I’m shooting at can’t tell the difference! LOL
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