Anyone running W231 in 40S&W? - MP-Pistol Forum

Anyone running W231 in 40S&W?

This is a discussion on Anyone running W231 in 40S&W? within the MP Reloading forums, part of the Smith & Wesson MP Forum category; I stopped in Cabelas today at lunch, and they just got some in. I wasn't prepared but grabbed 1lb. I remember using it for pistol ...


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Old February 12th, 2015, 02:48 PM   #1
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Anyone running W231 in 40S&W?

I stopped in Cabelas today at lunch, and they just got some in. I wasn't prepared but grabbed 1lb. I remember using it for pistol rounds. Hopefully it works for the 40S&W. I won't be home to look until next week.
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Old February 12th, 2015, 07:23 PM   #2
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I run WW231 in almost all of my pistol loads, its a great all purpose pistol powder. Its primary use is in light to moderate loads in 9mm, 38 special, 40 S&W and 45 acp, its a fairly fast pistol powder, so its not the best for heavy loads. The only caution is that it takes up very little space in the cartridge case, so it is very hard to tell if there is a double charge, good reloading safety practices keep any problems from arising.
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Old February 15th, 2015, 03:05 PM   #3
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What powder would you suggest that fills up the .40 case. I would prefer to have a double charge spill over. Keeps me honest. I don't need to be on a catastrophic failure you tube video.
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Old February 15th, 2015, 04:06 PM   #4
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The only powder that will overflow a case on a double charge is Trail Boss, its an extra bulky powder, but its not suitable for auto pistol cartridges, its designed for cast lead bullets in revolver cartridges, mainly designed around cowboy action shooting, you can kind of guess that from the name.

A good powder for 40 S&W that's bulkier than 231 is Unique, a good general purpose pistol powder, not as bulky as Trail Boss, but it takes up more space than 231. Unique is an Alliant powder product.

Alliant Powder - Unique

Hodgdon Longshot might be another one, I haven't used it personally, but it shows heavier weights of powder in the data.

http://www.hodgdon.com/shotpist.html

Last edited by G56; February 15th, 2015 at 04:11 PM.
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Old February 15th, 2015, 05:17 PM   #5
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231 is a great powder for 9mm.

Wish I could find a ton of it.

Loading IMR 4756 and its decent... just not the same snap as 231 imho but who knows. If someone gave me bullet for bullet of each I probably could't tell.

I just really like 231.
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Old February 16th, 2015, 02:34 PM   #6
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Perfect they had both 231 and unique. I debated which to buy and went with 231. As you can tell it has been awhile since I reloaded the 40. I also didn't walk in expecting to see either on the shelf. I am sure the 231 will be fine though. Thanks guys
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Old February 16th, 2015, 03:49 PM   #7
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Perfect they had both 231 and unique. I debated which to buy and went with 231. As you can tell it has been awhile since I reloaded the 40. I also didn't walk in expecting to see either on the shelf. I am sure the 231 will be fine though. Thanks guys
The problem with Unique is that it's a flake powder and doesn't meter well in small charges through volumetric powder measures. W231is a ball powder and meters very reliably. If you exercise reasonable care and/or use a powder checker in a progressive press, you should have no problems with 231.
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Old February 17th, 2015, 02:41 AM   #8
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Not sure what g56 worry is about case fill. Most all other powders fill to a lower level in the case when velocities are at the same levels . You will know if you throw a double change . Only a blind person would miss it .

I load with 231's bother hp-38 . It works well enough for 380 to 44mg for mid range loads with only heavier 9mm bullet being an issue.

I run a 5.4 to 5.6 gr with a 155gr swc for a practice load
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Old February 17th, 2015, 11:48 AM   #9
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I load on a Dillon RL550 which has a volumetric powder measure, like 98% of the powder measures out there, and it meters Unique and 231 equally well, if someone has trouble metering Unique, they have a problem with their powder measure.

WW231 takes up only a tiny bit of space in a case, in most calibers I can put a case with a single charge of 231 next to a case with a double charge and 9 out of 10 people won't really see a difference, 9mm might not be as bad as some others since its a shorter case, but as an example 38 special, you can't tell the difference at all.
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