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GP100 and shooting .38 and .357

This is a discussion on GP100 and shooting .38 and .357 within the Ruger Double Action forums, part of the Pistol & Revolver Forum category; I have really been enjoying my new Ruger GP100. I usually put 100-150 rounds through it each weekend, almost all .38s. There has been some ...


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Old March 29th, 2011, 08:00 AM   #1
 
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GP100 and shooting .38 and .357

I have really been enjoying my new Ruger GP100. I usually put 100-150 rounds through it each weekend, almost all .38s. There has been some chatter that firing .38s through the gun screws it up for .357s?

Now, I thoroughly clean my GP100 after each session such that each cylinder, and the barrel, return a clean patch.

Any issues with combining .38s and .357s? I plan to shoot about 80% .38s but enough .357s so that I remember how to do it.



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Old March 29th, 2011, 08:35 AM   #2
 
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As long as you clean the cylinder often there is no problem with shooting 38's in a 357. The only issue is when you don't clean the cylinder. It builds up gunk in the space that the longer 357 needs to chamber. Have fun with those 38's. By the way you can do the same with a 44 mag using 44 spl's. My 44 shoots 44 spl's about 10 inches up and to the left at 50 yds vice 44 mags in it.
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Old March 29th, 2011, 08:46 AM   #3
 
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You will have to scub a little extra in the cylinder where a powder ring forms, and if left to build up may interfere with the longer .357 cartridge. No big deal.
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Old March 31st, 2011, 03:22 AM   #4
 
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For the really thick fouling a dash of carb cleaner works wonders. (I would only do this with a SS gun though)
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Old March 31st, 2011, 04:23 AM   #5
 
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I enjoy shooting my GP also. But why is point of impact with .38 loads TOTALLY different from .357 loads?

A .38 load in this gun barely bumps your hand, if it didn't go bang I'd swear it didn't go off! Great guns!
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Old March 31st, 2011, 02:01 PM   #6
 
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Heck, even the .357 feels "light" recoil wise in this gun! Love it!
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Old March 31st, 2011, 08:46 PM   #7
 
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Quote:
Originally Posted by Lefty View Post
I enjoy shooting my GP also. But why is point of impact with .38 loads TOTALLY different from .357 loads?

A .38 load in this gun barely bumps your hand, if it didn't go bang I'd swear it didn't go off! Great guns!
I do this with a Security-Six, and yep, it's lots of fun. For me, the light .38 loads have a lower POA than the stiffer rounds. Same applies to the SRH 454. I'm told that this is because of greater muzzle rise with the hotter rounds as the bullet travels through the barrel.
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Old March 31st, 2011, 09:19 PM   #8
 
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Quote:
Originally Posted by Redleg View Post
I have really been enjoying my new Ruger GP100. I usually put 100-150 rounds through it each weekend, almost all .38s. There has been some chatter that firing .38s through the gun screws it up for .357s?

Now, I thoroughly clean my GP100 after each session such that each cylinder, and the barrel, return a clean patch.

Any issues with combining .38s and .357s? I plan to shoot about 80% .38s but enough .357s so that I remember how to do it.
If you ever end up with a problem with the carbon ring, use a .40 bronze cleaning brush or a .38 stainless chamber brush.
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Old March 31st, 2011, 10:17 PM   #9
 
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How long does it take you to get rid of the carbon rings? I was doing it with hoppes and it did not seem to go away with a carbon brush. Perhaps it's the coning from using a 38 in a 357 chamber. This was after only 50 rounds through the GP100.
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Old April 1st, 2011, 06:11 PM   #10
 
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Is your GP100 stainless? If so, another very effective way to get rid of that carbon is an ultrasound machine with a built-in heating element. I've tried it on my cylinder and the results are spectacular. Afterward, make sure you wash it thoroughly with some warm water, hit it with a little Hoppe's to get rid of any remaining carbon, then spray it very well in all the nooks and crannies with a water displacer to get rid of all the ultrasonic cleaning compound (I use WD-40--very effective), dry off, and then gun oil as you normally would.

If your GP100 is blued, then I've heard ultrasonic can take off the bluing.

Another way to do it, and the way that I do it with my (blued) Security-Six, is to wet down the chambers with some Hoppe's and let it soak for a few minutes. Then take a .357 Magnum case and just scrape out any carbon. Hit the chamber with your chamber brush afterward as a finishing step. Works like a champ.
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Old April 4th, 2011, 10:31 AM   #11
 
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Just wrap a few sands of Chor Boy 100% copper cleaning pads around an old cleaning brush and the carbon ring will disappear in a few strokes. Finish up with some Hoppes on a clean patch and you are good to go.

Take Care

Bob
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Old April 4th, 2011, 09:31 PM   #12
 
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If you're going to shoot both on the same trip to the range, shoot the .357 first. I shot a hundred rounds or so of kinda smoky .38 handloads at a steel match once, then switched to .357 -- big mistake! I had to do a reload on the clock and I couldn't get the .357 brass to eject. Being in a hurry I just smacked the ejector rod harder. Ripped a hole in my palm. Ow! Blood all over the place. Entertaining for the audience though.
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Old April 6th, 2011, 09:54 AM   #13
 
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I went again today. After that initial box of .38 Special I shot when I first got my GP100 (also the most dirt), I have only shot Magnums since and today I just needed light clean-up. IMO it is much cleaner shooting Magnums only.
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Old April 6th, 2011, 10:20 AM   #14
 
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Quote:
Originally Posted by intercooler View Post
I went again today. After that initial box of .38 Special I shot when I first got my GP100 (also the most dirt), I have only shot Magnums since and today I just needed light clean-up. IMO it is much cleaner shooting Magnums only.
Good input. I have only shot Magnums one time. I have been planning to shoot up my current supply of 38s and switch to 357 more or less permanently. Main reason is that I discovered that shooting magnums is a pretty different skill set from shooting 38s, at least for me. Problem is that Turners has not had any magnum target ammo lately. Maybe today.
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Old April 7th, 2011, 03:29 AM   #15
 
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Has anyone shot Winchester's "WinClean" ammo? It is supposed to use "clean burning propellants that generate less barrel, action and shell case residue."
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