357s don't fit but 38sp do

This is a discussion on 357s don't fit but 38sp do within the Defensive Carry Guns forums, part of the Defensive Carry Discussions category; I've seen this posted before but never had a problem myself. I had a new (never been fired) ruger that when taken to the range, ...

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Thread: 357s don't fit but 38sp do

  1. #1
    Member Array Stufftoad's Avatar
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    357s don't fit but 38sp do

    I've seen this posted before but never had a problem myself.

    I had a new (never been fired) ruger that when taken to the range, would not allow the cylinder to close when filled with 357 rounds.
    I could "seat" them properly with some individual effort to each round and get the cylinder shut but, did not fire any for fear of getting them stuck.
    Before I brought the gun out, I cleaned it properly, even used a brass brush in the cylinder.
    Is there something wrong here?

    I've read shooting 38sp w/out cleaning can cause build up to not allow 357 to fit properly.
    In this instance, I cleaned what was a new revolver, and they wouldn't fit.

    I was attempting to use PMC ammo. I did try 3 different boxes. So I'm guessing it was not bad or out of spec ammo.

    I did end up shooting 38sp through it with no problems closing the cylinder.

    Can someone give me some advice?

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  3. #2
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    What model Ruger?
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    Are you sure that you have a .357 mag revolver?

    Can you post any pictures?
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    VIP Member Array GhostMaker's Avatar
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    Quote Originally Posted by pgrass101 View Post
    Are you sure that you have a .357 mag revolver?

    Can you post any pictures?
    Yep....pictures would help. Ruger made a GP100 in 38Spl only, and I just saw one a few weeks ago from a run Ruger did (adjustable sights, 3" barrel).
    bigmacque likes this.
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    Member Array Stufftoad's Avatar
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    It's a gp100. Definitely 357.

    Another detail, I repeatedly checked under the extractor. There was no dirt/dust or excessive oil.

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    VIP Member Array GhostMaker's Avatar
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    Have you tried any other brand of 357 rounds in it? It is possible that you got a bad run. If you can't get any magnum ammo to work in it you might want to contact Ruger. They have EXCELLENT customer service and would likely have you send it to them for work, if you could part with it for a while.
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    I would still try another brand of factory ammo first if your three boxes are all PMC.
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    Member Array Stufftoad's Avatar
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    I have some Winchester and Fiocchi I found online on the way.

    I did get the PMC at different places but, maybe it just doesn't like my gun.

  10. #9
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    Quote Originally Posted by QKShooter View Post
    I would still try another brand of factory ammo first if your three boxes are all PMC.
    Yep if the cases are out of spec could be the problem,IMHO even if you have to force the cases in to close the cylinder it's not gonna blow your gun up since when you fire a round the case wil expand to the cylinder dimensions anyway
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    Member Array Woodwrkr221's Avatar
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    If there's a 38 special ring in the cylinder (in a new gun??) scrubbing with a brush won't always remove the ring. Sometimes this requires scraping with a brass instrument like an empty 357 casing. It's worth checking on.

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    Distinguished Member Array AZJD1968's Avatar
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    Please make sure that it says .357 on it.
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    I used to shoot many .38s in my .357 Blackhawk and even the most casual cleaning never left any ring that made loading .357s difficult. Something is amiss.
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    VIP Member Array Stevew's Avatar
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    Are you sure the cases aren't 357 Max rather than 357 Mag. If the rounds will not chamber and the cylinder is clean I would guess the brass is to long or the cylinder is out of spec.
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    VIP Member Array Yoda's Avatar
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    Need pictures to diagnose.

    Overall spec length for 357 mag is 1.59 inches, use calipers on your ammo.
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    Interesting!!
    I have a Ruger GP 100 (Yes 357 Magnum right on the barrel) that I've had the same problem with.
    Mine was a used gun that I suspect had mostly 38 run through it.
    I ran a bore snake into the cylinder and managed to get it to accept the 357.
    I still hesitate shooting the 357 though because I'm wondering if they will in fact go through.
    I will be going through it again with a proper cleaning but found this post kind of deja vu.

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