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GP100 7 SHOT 357, not completely fixed

This is a discussion on GP100 7 SHOT 357, not completely fixed within the Ruger Double Action forums, part of the Pistol & Revolver Forum category; Originally Posted by aboriqua If they offer the option to switch for a 6 shot It is what I would take. I cant be bothered ...


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Old February 13th, 2020, 12:34 PM   #136
 
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Quote:
Originally Posted by aboriqua View Post
If they offer the option to switch for a 6 shot It is what I would take. I cant be bothered with ANY gun that is finicky about ammo. Most of us can remember well the great ammo shortage that happened a few years back. What was on the shelf was what there was. If it happens to not be compatable with your gun ... your stuck

Even if you roll your own .. I dont want to worry about what components are available and what will work in a finicky gun.

I have a 686 plus and it has never had an issue with any of the brass I use. Still ... in hindsight .. I think I like the 6 shooter just a bit better.
I've decided that if my 7 shot has unfixable problems and they wont give a 6 shot that I may see about a cheaper Taurus 692 as a back up for the rounds my ruger wont take(those 692s also have second cylinder for 9mm). This is a big if as I'm hoping that either A. My 7 shot now takes all and can be fixed to do as such or B. Ruger replaces with a reliable six shooter of same specifications as my 7 shot



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Old February 13th, 2020, 01:00 PM   #137
 
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Quote:
Originally Posted by CoffeeShooter14 View Post
To save time and money what's widest rim 357/38 ammo reported? Will order and try
No one knows which is widest because not everyone measured them. They just reported which ammo brands they had problems with. This is the list of ammo that people reported having problems with:

Blazer Brass .38 Special 125 gr. FMJ
Magtech .38 Special and 357
Armscor .38 Special 158 gr.
WInchester USA white box .38 Special
Hornady Critical Duty 357 (3/6/18)
Blazer Brass .357 (3/20/18) Woody Hayes in comments
Tula (3/20/18) Woody Hayes
GECO 357mag (6/14/18) giantpune
Vollmantel FMJ .38 special (10/24/18) Linda Goodman

That doesn't mean that everyone who tries this ammo will have problems or even that the people who reported problems would necessarily have problems with a different box of the same ammo. Even in the same box, rim diameters will vary a bit. Rim diameters are specified to have a dimension and a tolerance. The max diameter is 0.440 inches. Most people reported having problems with rims that were larger than 0.436 inches. A 6-shot will not have problems with a full load where all the rims are at max diameter. I doubt that any of the 7-shot GP100s would do the same, but the chances of that ever happening is close to zero.

I highly doubt Ruger will give you any trouble if you ask them to replace a 7-shot with a 6-shot.
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Old February 16th, 2020, 09:07 AM   #138
 
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Just a quick update from my end...

I haven't heard back from Ruger CS since sending in the pictures of the canted barrel. The CS rep I was working with has been gone, so just waiting for her to return to work. She seemed sincerely concerned about the pictures of the replacement revolver I sent in and was going to forward them to her supervisor. Hopefully I'll hear something this week.

Here's one of the pictures...
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Old February 19th, 2020, 07:15 AM   #139
 
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I had a layaway deposit on a GP100 7 Shot /1771, but after reading this thread (& many others) I decided to pull the plug on it and put the funds toward a S&W 686 Plus. Slightly disappointed as I really do like the GP100, especially the 1771. Ruger is a great company (I own several of their firearms), but they really blew it with the 7 Shot GP. I agree that there is likely no real fix without modifying the frame, etc. Even my LGS said "I don't blame you." They had two come back already.
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Old February 21st, 2020, 05:14 PM   #140
 
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Well update. I fired at range and all ammo I mentioned before performed flawlessly. I did buy a 4th ammo at the range the magtech 38 special which functioned amazing as well minus one failure to fire which was faulty ammo not the guns fault and no rim overlap.
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Old February 21st, 2020, 10:09 PM   #141
 
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Quote:
Originally Posted by CoffeeShooter14 View Post
Well update. I fired at range and all ammo I mentioned before performed flawlessly. I did buy a 4th ammo at the range the magtech 38 special which functioned amazing as well minus one failure to fire which was faulty ammo not the guns fault and no rim overlap.
Do you know when your GP 100 7 shot was made? This keeps my hopes up. Currently Im set on getting a 686 plus, but if the 7 shot GP is fixed, i will revert back to Ruger. I always live the stronger thicker look of The GP vs the 686.
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Old February 22nd, 2020, 08:03 AM   #142
 
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UPS picked up the GP-100 yesterday and it's heading back to Ruger for the barrel/finish issue. Never fired it, so no range report.

Fingers crossed 3rd gun (second replacement) is a charm.
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Old Today, 02:14 AM   #143
 
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Quote:
Originally Posted by PTAGP100 View Post
Do you know when your GP 100 7 shot was made? This keeps my hopes up. Currently Im set on getting a 686 plus, but if the 7 shot GP is fixed, i will revert back to Ruger. I always live the stronger thicker look of The GP vs the 686.
The GP100 has never been "fixed". The poster was just lucky that all the ammo he shot was on the less than maximum end of SAAMI specs for length. You may want to read again what Iowegan posted earlier in this thread here:

https://rugerforum.net/ruger-double-...ml#post4271073
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Old Today, 04:26 AM   #144
 
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Quote:
Originally Posted by socrates007 View Post
The GP100 has never been "fixed". The poster was just lucky that all the ammo he shot was on the less than maximum end of SAAMI specs for length. You may want to read again what Iowegan posted earlier in this thread here:

https://rugerforum.net/ruger-double-...ml#post4271073
What if the firing pin hole in the cylinder frame were higher on the newer production guns? Wouldn’t that allow the chambers to be spaced apart sightly more so that runs wouldn’t overlap?
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Old Today, 07:39 AM   #145
 
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"What if the firing pin hole in the cylinder frame were higher on the newer production guns? Wouldn’t that allow the chambers to be spaced apart sightly more so that runs wouldn’t overlap?"

What would need to be done is not only move the firing pin up BUT also the barrel towards the top of the frame. This could be done (S&W did this to their N frame when going to the 8 shot models) but would have a cost that I guess Ruger does not want to incur. They would need a separate frame for the 7 shot models UNLESS the converted the entire GP line to the new frame.
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Old Today, 10:33 AM   #146
 
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I have worked in manufacturing with similar problems. It is usually caused by the design not working out as intended or request to produce a premium product without a redesign. Many times we would change from bilaterial to unilaterial tolerances for a few of the critical dimensions. This is a fancy way of saying that the tolerances were only permitted in one direction.

For the GP100, fitting 7 rounds with a base of 0.44" would require moving the cylinder holes out about 0.008". This would also require moving the firing pin and barrel up a little plus either widening cylinders or living with thinner cylinder walls.

If I were Ruger, I would change to a unilateral tolerance for the 7 shot models. After casting is completed, I would bin frames and cylinders into either 6- or 7-shot buckets. Wider frames and cylinders get used for 7-shot models. The 7-shot components would be machined to unilateral tolerances. This would probably result in a higher scrap rate, but less customer returns.
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