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Old 08-26-2013, 02:42 PM
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Default .32 ACP in a .32 S&W revolver?

I periodically see posts in this forum where someone is using .32 ACP ammo in a .32 S&W/long/H&R Mag/327 Mag. To the best of my knowledge, the ACP is a smaller bullet diameter, and most of the available ammo would be hotter than the original .32S&W loads as well. Any thoughts on this?
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Old 08-26-2013, 02:49 PM
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I'VE BEEN SHOOTING .32ACP IN S&W .32 REVOLVERS FOR YEARS. I COUD GET THE .32 ACP AMMO CHEAPER. JP
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Old 08-26-2013, 03:00 PM
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I would not use .32 ACP in a black powder era .32 S & W top-break, but it should be fine in a modern .32 S & W Long or H & R/Federal Magnum gun.

Edit to add: Can you? Yes. Should you (when you can find the proper ammo for the chambering)? I wouldn't.
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Old 08-26-2013, 03:25 PM
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SAAMI maximum average chamber pressure for .32 ACP is 20,500 psi. SAAMI has not set a pressure limit for .32 S&W but for .32 S&W Long it is 15,000 psi. The pressure .32 ACPs are intended to produce amounts to a proof load for modern .32 S&W Long revolvers. Those who want to make their .32 S&W Long revolvers inaccurate by firing .32 ACP in them claim that as the undersize bullet passes through the long chamber gas escapes around the bullet lowering pressure. .32 ACP cases are .075” longer than .32 S&W cases which has the potential to jam the .32 ACP case mouth into the .32 S&W chamber throat pinching it and raising .32 ACP pressure. Additionally all the .32 S&W revolvers that I am aware of are weak old hinge frames.

There’s no stupid question but there surely are unsafe ideas posted on the internet.

PPCSHOOTER, did you read the question carefully? HoundDog316 is asking about firing .32 ACP in a .32 S&W, not a .32 S&W Long.

Last edited by k22fan; 08-26-2013 at 03:33 PM.
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Old 08-26-2013, 03:48 PM
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(Here we go again...)

Use the proper ammunition for the firearm at hand. Listen to people who say otherwise at your own risk and peril.
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Old 08-26-2013, 03:57 PM
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.32 ACP should not be used in place of the .32 S&W as most .32 S&W guns are weak top-breaks. The chamber pressure is too high. I have fired a great number of .32 ACP rounds in newer revolvers (in .32 S&W Long and .32 Mag), and they have worked OK for me. Using .32 S&W Long ammunition is the preferred option.

I long ago reloaded very mild .32 cast bullet loads in .32 ACP cases for use in a .32 S&W breaktop, and they worked,
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Old 08-26-2013, 05:27 PM
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Quote:
Originally Posted by HoundDog316 View Post
I periodically see posts in this forum where someone is using .32 ACP ammo in a .32 S&W/long/H&R Mag/327 Mag. To the best of my knowledge, the ACP is a smaller bullet diameter, and most of the available ammo would be hotter than the original .32S&W loads as well. Any thoughts on this?
K22FAN
YEP I READ IT RIGHT, DID YOU?

MURPHYDOG
IS CORRECT, I DO USE THEM IN .32S&W LONG AND .32H&R MAGS REVOLVERS
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Old 08-26-2013, 06:15 PM
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Thanks for the discussion-pretty much answers my question. While I did reference the other .32s, my main question concerned the .32 S&W (short) due to multiple issues of pressure, case length, bullet size, etc. with the acp. Mostly wondering what the folks on this forum thought.

For the long & magnum 32s, the only issue 'should' be the smaller bullet diameter. While certainly no expert, I know some hand loaders experiment with slightly different bullet diameters to improve accuracy, operation in worn barrels, etc. Didn't know what the community thoughts were.
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Old 08-26-2013, 06:30 PM
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Quote:
Originally Posted by PPCSHOOTER View Post
K22FAN
YEP I READ IT RIGHT, DID YOU? [...]
I can see how you interpreted the body of his text to mean HoundDog316 was asking about firing .32 ACP in .32 S&W Longs. I donít doubt J frames and perhaps I frames going back as far as their cylinders have been heat treated have an adequate margin of safety, but reloading some S&W Long brass makes more sense to me.
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