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Thread: Are GP100 7 shot .357's reliable now?

  1. #11
    Pure speculation, but couldn't Ruger move the rear of the charge holes out 0.015, but keep the front of the chambers in line with the current spec? I believe that some aftermarket percussion to centerfire conversion cylinders for cap'n'ball revolvers have used this trick to work in smaller framed guns. They would leave a "blank" or unmilled chamber to make up the difference in diameters from the cartridges versus the original cylinder. This had the added effect of allowing a safe place to rest the hammer.

  2. #12
    Member
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    Aug 2017
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    Central Texas
    Wouldn't recessed chambers solve it?

  3. #13
    Banned
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    Sep 2020
    Quote Originally Posted by Bruce in WV View Post
    I have an older production 2 1/2" 7 shot .357 GP100.
    The cylinder bound up, wouldn't eject spent cases or close. I returned it on a factory shipping label and Ruger is replacing it with a new one off the current production line.

    Here's the big question. Have there been engineering changes that make this model 100% reliable? I'd like to keep this as a woodland carry gun; its a desirable caliber, easy to carry, and is comfortable to shoot even with full power loads.
    I was unaware of this issue, and of the subsequent "fix". (which seems worse than the problem to be honest)

  4. #14
    Member Bruce in WV's Avatar
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    Feb 2013
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    Rec'd replacement gun

    I received the replacement gun today. I haven't gotten to the range, but I did "try fit" a variety of cases.

    My Starline cases have plenty of room between rims - visible space. A mix of commercial brass cases - I don't sort by head stamp except for the Starline - (Blazer brass, WW, Rem, Fed, Speer, and Magtech) were all much closer, but none bind against each other and the cylinder closes properly.

    I won't get to the range until the middle of next week. I'll post an update again afterward with a "dirty gun" report.

    Thank you Ruger Customer Service for making this a painless experience! I'm keeping my fingers crossed that your engineers hit a homerun with their secret fixes to this serious problem.
    Last edited by Bruce in WV; 09-04-2020 at 03:25 PM.

  5. #15
    Member Bruce in WV's Avatar
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    Comparisons

    Following up with closer look at the new gun using a broad spectrum of brass picked at random from a batch bought off the internet, compared to my Starline, bought new and tracked. This looks very promising.

    Photo 1 of misc brass reloads pulled at random from a baggie of ammo. I got these off the Ruger forum as an unknown # of reloads and have done no case prep other than run them through the vibrating cleaner. Using my Lyman Electronic Caliper they measure:
    Blazer .440 PMC .436 X-treme .4315 3-D .432 Perfecta .433 A USA .4305 G.F.L. .434

    1D8E3145-C639-4324-AF5E-CC1CA3B5EBC5 by Bruce, on Flickr

    Photo 2 of Starline twice-fired, same simple case prep, measuring: .432 .4315 .4315 .432 .4315 .432 .432

    6F0014F5-043C-4216-8217-E533E19AD2D3 by Bruce, on Flickr

  6. #16
    Can you verify cylinder diameter based on post #7?

    cylinder diameter was increased from 1.545" to 1.550".

  7. #17
    Member Bruce in WV's Avatar
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    Quote Originally Posted by jh9 View Post
    Can you verify cylinder diameter based on post #7?
    The cylinder measures 1.550 halfway between the notches and the flutes.

  8. #18
    Thanks.

    Good to hear verification they changed the size.

  9. #19
    Quote Originally Posted by jh9 View Post
    Thanks.

    Good to hear verification they changed the size.
    Yes! This is quite encouraging.

    Sent from my SM-G973U using Tapatalk

  10. #20
    The Nostomaniac 03RN's Avatar
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    Aug 2017
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    New Hampshire
    7 shot .357s are hot. Especially with 3" barrels and fixed sights.

    Kinda like that girl in my hs that wore painted on boot cut jeans, wife beaters, and chokers everyday.

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