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Author Topic: Migrating powder  (Read 837 times)

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Offline Tad Houston

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Migrating powder
« on: March 19, 2009, 09:06:58 PM »
I have a recipe for winchester poly formed super X hulls with a plastic base wad, 30grs HS6, and a WinAA12 wad for 9 pieces of 00 buck that is a great load, but if you shake the loaded round you can hear the powder getting around the wad cup. I dissected one and found powder between the cup and the load- not good! I then cut a hull in half and found that the wad cup was loose in the hull with room around it for powder to get by. These hulls where originally loaded with 00 buck. do I need an over powder card, or a wad with a larger diameter cup? Thanks for any suggestions, I really would like to use these hulls.

Tad
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Offline .45 COLT

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Re: Migrating powder
« Reply #1 on: March 21, 2009, 09:43:42 AM »
I believe the Winchester Polyformed shell is a straight-wall hull. I would try a Federal 12S3 wad, which is made for straight walls. Looking through load data which uses both wads, it looks like you won't have to change the powder charge.

DC
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Offline Tad Houston

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Re: Migrating powder
« Reply #2 on: March 21, 2009, 11:59:25 AM »
Yes, it does seem to be a straight wall hull, but according to the Lyman ID pictures there are lots of straight wall hulls that use the WAA12 wads. Does someone happen to have a Federal 12S3 wad they could measure the diameter of the cup on?

Thanks for the reply :)!
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Offline .45 COLT

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Re: Migrating powder
« Reply #3 on: March 21, 2009, 12:15:48 PM »
.727" - .728" for 12S3.

Lyman, like a lot of others, has a lot of loads that aren't the finest ever created, or that just plain don't fit right.

DC
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On the 19th of April, 1775, a tyrannical government sent an army to disarm its citizens. They ran into a touch of trouble.

Offline Tad Houston

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Re: Migrating powder
« Reply #4 on: March 21, 2009, 01:03:57 PM »
Cool, thanks! My wads measure .700 so that could make all the difference. I measured the hull and it looks like .735-.740

Tad
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Offline Mike Robinson

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Re: Migrating powder
« Reply #5 on: March 22, 2009, 07:42:36 AM »
Ballistic Products and Precision Reloading have a few wads that have OD's of 0.725" to 0.730". The "straight-walled" hulls typically have an ID of about 0.740", and most of the wads listed in the various reoading guides have OD's of 0.690" to 0.710". If people used clear plastic hulls, they'd be amazed at the amount of powder migration past the wads.
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