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Old 09-01-2020, 11:20 AM
Whino83 Whino83 is offline
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Default Bullet Diameter

I have a big bag of old bulk packed 38/357 jacketed bullets I am wanting to load up but theyre measuring .358 in diameter. All of my others I have (Hornady and Sierra) measure .357. Im not sure if these are safe to load or if I need to pick up a die and resize them down to .357. What do you guys think?
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Old 09-01-2020, 11:59 AM
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They will be just fine. Be sure to carefully work up to maximum safe loads.
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Old 09-01-2020, 01:09 PM
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Most throats in a S$W are 357. Unless you load hot nothing to worry about.
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Old 09-01-2020, 01:18 PM
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Use em! Worst case, you may find they're much more accurate and end up selling all your .357" projectiles.
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Old 09-01-2020, 03:21 PM
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I was thinking they’d be fine. These are just going to be used for target loads so it’s not like I’m going to be hot rodding them or anything.
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Old 09-02-2020, 02:50 AM
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If you haven't already, buy a micrometer to accurately measure your bullets.

You'll be suprised at the difference between it & a caliper.

.
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Old 09-02-2020, 07:14 AM
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I was thinking theyd be fine. These are just going to be used for target loads so its not like Im going to be hot rodding them or anything.

Since they are jacketed bullets, do not go real light with the powder charge or you might end up with the lead core exiting the barrel, but the jacket stuck inside the barrel. For jacketed loads, I recommend loading them to full power 38 Special levels or even 38 Special +P levels. This is incredibly easy to do with 357 Magnum brass and they will still be pleasant to shoot in anything bigger than a 2 inch barreled J-frame S&W.
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Old 09-02-2020, 10:19 AM
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Little story... I once had a pistol rebarrelled. It was a .45 Colt, and said so on the new barrel, as well. Turns out, it was a .44 magnum barrel. Longstory short, I out two rounds of .45 Colt down the .44 caliber barrel before the light bulb came on. Besides kicking like a mule, there were no ill effects. You should be fine with your .358 bullets.

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Old 09-02-2020, 11:40 AM
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Originally Posted by memtb View Post
I may be incorrect, but, I think that many perhaps most handgun bullets are listed as 0.358 diameter! memtb
For 38 Special/357 Magnum, the standard bullet diameter is 0.357" for jacketed bullets, but swaged and cast lead bullets are usually 0.358" diameter.
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Old 09-02-2020, 11:42 AM
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Little story... I once had a pistol rebarrelled. It was a .45 Colt, and said so on the new barrel, as well. Turns out, it was a .44 magnum barrel. Longstory short, I out two rounds of .45 Colt down the .44 caliber barrel before the light bulb came on. Besides kicking like a mule, there were no ill effects. You should be fine with your .358 bullets.

That's a huge difference in diameters!
So, what was the final solution, another re-barrel job or fit a 44 cylinder?
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Old 09-02-2020, 01:18 PM
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As long as they are consistently .358, you will have no trouble. There is enough variability in diameter of bullets to encompass .358.

I.e., .357 is actually .357 +/-.
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Old 09-02-2020, 02:07 PM
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Quote:
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That's a huge difference in diameters!
So, what was the final solution, another re-barrel job or fit a 44 cylinder?
I fit another, correct, barrel.
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Old 09-02-2020, 05:51 PM
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You're talking about a .001 difference in diameter, .0005 on each side. Hardly an area of concern.
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