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forcing cone erosion/how bad?

This is a discussion on forcing cone erosion/how bad? within the Pistols & Revolvers forums, part of the Pistol & Revolver Forum category; Bought this GP-100 357MAG NIB OCT. 2016. Fired only factory ammo. Shot @ 300 rounds of 130gr. 38 special FMJ, 600 rounds of 158gr 357mag ...


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Old April 12th, 2017, 12:30 PM   #1
 
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forcing cone erosion/how bad?

Bought this GP-100 357MAG NIB OCT. 2016. Fired only factory ammo. Shot @ 300 rounds of 130gr. 38 special FMJ, 600 rounds of 158gr 357mag FMJ, 400 rounds of 158gr. 38 special FMJ. All brass. I was surprised to notice this wear when cleaning the gun. Have any of you GP owners seen this kind of wear in relatively new gun? It was cleaned after every range session. It's not lead spatter.
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Old April 17th, 2017, 11:51 AM   #2
 
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I'm not an expert on force cone erosion but I would say thats pretty bad for 1400 factory rounds.
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Old April 17th, 2017, 01:15 PM   #3
 
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A call to Ruger will help.
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Old April 17th, 2017, 03:42 PM   #4
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A whole lot of ugly there!
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Old April 18th, 2017, 12:32 PM   #5
 
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Shoot it until there is a performance/safety issue. No point in worrying about aesthetics on a working gun. You may put 5000 rounds through it before a real problem develops, if one ever does.
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Old April 18th, 2017, 12:35 PM   #6
 
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You need to contact Ruger and let us know how they helped.
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Old April 20th, 2017, 01:37 PM   #7
 
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gp-100 357 forcing cone

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Originally Posted by ddub View Post
Shoot it until there is a performance/safety issue. No point in worrying about aesthetics on a working gun. You may put 5000 rounds through it before a real problem develops, if one ever does.
I thought about whether to continue to shooting it but at the rate of 3000 rounds a year I figured since it's only 5-6 month old gun I was better off contacting Ruger. I was just asking your opinions of the wear being premature or not considering what I was shooting. Although I've owned long guns for 40+ years, I'm relatively new to handguns. Since I'm an old fart, I really enjoy shooting revolvers. I probably should have mentioned it, but I had already sent the gun back to Ruger per their request after viewing that picture. I got it back today rebarreled, reblued and polished in about a week and a half. I didn't cost me a nickle and looks better than it did new. Very impressive customer service for a company that doesn't give a written warrantee. Going to take it to the range tomorrow. Glad I joined this forum and thanks for the input.
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Old April 20th, 2017, 01:59 PM   #8
 
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Wow, OP, that damage was pretty dramatic. Glad to see Ruger fixed you up right away.

I'm really curious, though. Any idea what caused that to happen?
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Old April 20th, 2017, 02:42 PM   #9
 
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Another positive Ruger report.......

Can we see a pic of the fix?
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Old April 21st, 2017, 02:15 AM   #10
 
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Another happy Ruger customer
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Old April 21st, 2017, 04:33 AM   #11
 
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Originally Posted by ditto1958 View Post
Wow, OP, that damage was pretty dramatic. Glad to see Ruger fixed you up right away.

I'm really curious, though. Any idea what caused that to happen?
Me too and no I don't know what caused it. I've done a lot of reading on various sites on the causes like too many hot hand loads and shooting under 125 grain bullets with too much powder causing flame cutting ect. My trips to the range consisted of 150 rounds 158grain 38 specials and 158 gr. 357 FMJ factory ammo. No rapid firing involved but I did often shoot 150 rounds in an hour. Maybe heating gun up too much caused excessive wear. I think I'll slow it down from now on. I did notice once that a good sized fragment of jacketing landed on my bag at the range and looked like it had come from my gun. Ziggidy, here's the pics. One question I have is they got some blueing om the face of the cone. Should I worry about getting it off of there? Will it cause the cone to heat up there like a build up of carbon or lead might?
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Old April 21st, 2017, 04:59 AM   #12
 
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Glad to hear that Ruger fixed you up quickly and satisfactorily.

Reallly, that wasn't that many rounds on the barrel to cause that type of erosion. Nor did those rounds appear overly or improperly charged.

Leads me to guess/surmise that the metal on that barrel may not have been up to the usual standards. Just a speculation...

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Old April 21st, 2017, 05:01 AM   #13
 
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OP, I have a Blackhawk that probably has had more rounds through it than your gun did, but similar ammo. It still looks like your "after" pics.

Generally, when you read about these things, "they" say that screamer 125 grain .357 rounds can wear out revolvers prematurely, but you didn't do that.

As Yul Brynner said in the movie The King And I, "Is a puzzlement."
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Old April 21st, 2017, 09:29 AM   #14
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ditto1958, It's not a "puzzlement" to me . No doubt, when the barrel was manufactured, it was not heat treated properly. This makes the edge of the forcing cone vulnerable to flame cutting. The OP's forcing cone was only damaged at the very edge ... not farther in where bullets contact so it has no influence on accuracy. It likely would not cause any problems for 10's of thousands of rounds, however it is a cosmetic issue and Ruger did repair it.

I've had a good many Ruger SAs come in my shop with a lot worse forcing cone conditions and they still shot just fine. Using an 11 deg reamer totally fixes the problem ... plus it makes the gun more friendly with lead bullets. That said, I think the OP made the right choice to let Ruger take care of it.
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