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Old 09-17-2018, 01:36 PM
fmiller4 fmiller4 is offline
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Default 158’s in my new (used) 627???

So I just got a S&W 627. Not a Performance Center, but I think I will somehow still manage to have fun with it.... ))

As everyone but me seems to have already known - the 627's cylinder is slightly shorter than the 686 and people have posted with problems using 158 gr bullets. The gist of the problem is that, for 158 RN's, the OAL is just a little too long for the chamber.

Have any of you encountered this?

Do any of you know the max OAL for this gun?

Montana Gold makes a 142gr bullet (.38/142gr FMJ - 1,000ct revolver) --- have any of you tried this?

Lastly, where would you go to find load data (2400 or 231) for this kind of odd weight....?
(I shoot at paper, but still want to feel some punch)

Sorry. Lots of questions.... too much coffee....


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Old 09-17-2018, 08:55 PM
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Maximum OAL for .357 Magnum is 1.590" for any bullet style. Any ammunition loaded to this length will function in any .357 Magnum revolver.


Apparently you have not yet discovered that when hand loading ammunition cartridge OAL is your decision! If your ammunition is too long seat the bullets a bit deeper! You are the one in control, and if you don't understand this you should stop hand loading until you figure it out.
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Old 09-17-2018, 09:05 PM
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For the 142 grain use any of the 140 grain data such as Speer or Sierra and back off one half grain and then work back up.
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Old 09-17-2018, 09:48 PM
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I have a 627 Pro, along with 7 model 27 N frames and I've never run into a problem with OAL with 158 grain lead bullets. But then I do not load round nose bullets either. In 158 grain lead I load SWC lead bullets and crimp on the cannelure and no problems. I also load 180 grain RNFP Hi Tek coated lead bullets in 357 and as long as I crimp in the cannelure I have no problems fitting them in the cylinders of my N frame 357's.
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Old 09-17-2018, 09:50 PM
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I load for several different 357 revolvers, including one N-frame. Never had any such trouble.
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Old 09-17-2018, 10:01 PM
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Seat your bullet deeper and crimp over the front band. Problem solved.
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Old 09-17-2018, 10:23 PM
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2 posts in 12 years on the Forum? You must be a bit on the shy side

I have been shooting hard cast 158SWCs in the 27/327/627 family of revolvers for more then 4 decades.

I have never had a COL problem but then I do not load any lead round nose projectiles for the 357 Magnum cartridge

I had no idea that a 586/686 cylinder was longer than a 27/327/627 cylinder but then I have never warmed up to the L-frames. I never saw the need for a revolver that almost looked like a Python and was almost as robust as an N-frame. I know there are lots of folks that love them

As stated above, if you load is too long, seat the projectile deeper.

You do not list what your existing load is.

Presuming it is not a MAX load, reducing the case capacity by seating deeper is not going to get you up into the danger zone
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Old 09-17-2018, 11:44 PM
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Back when the N frame .357 Magnum was created a 158gr lead bullet was almost all that was shot in them. Now some jackets bullets have the crimp groove in a spot that could cause a problem. Hornady solved that problem by putting 2 crimp grooves on their XTP bullet.
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Old 09-18-2018, 02:41 AM
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My 627PC & 327TRR8 have cylinders that are 1.575" long (my 686-6 is 1.625" long).

The maximum COAL" for it would be 1.575" + .060" (rim thickness) = 1.635"

As mentioned, make a test round & if it's too long seat it a little deeper & adjust your powder charge down accordingly.

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Old 09-19-2018, 12:02 AM
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I have no problems loading a 15g gr Lswc out to 1.62" in my L frame and...
a 158gr LRN out to 1.55" for light target work in my little J frame.

Every bullet has "It's" design and shape to work with, to get a correct fit.
However I do shorten my maximum loads, just in case they might "Jump" a little bit.
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Old 09-19-2018, 12:26 AM
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Quote:
Originally Posted by robertrwalsh View Post
I load for several different 357 revolvers, including one N-frame. Never had any such trouble.
The N frame cyl is definitely shorter than most, even a K frame's, so you do have to watch your oal with longer/heavier bullets.
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