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Old March 12, 2007, 08:59 AM   #1
garbageman
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38 Spl 158 gr SWC is only 148 gr

I have had some cast bullets I purchased some time ago, the store where I got them is no longer in business. I think the owner bought bullets from a bulk supplier. They are unbranded, simple white box with printed information of diameter, weight and style bullet stamped on the top.

I decided to weigh some of my bullets on my RCBS 505 scale.

I found that the avg weight of the bullets were 148 gr.
Diameter is correct at .358 and they are SWC.

Should I use loading data for the 148 gr HB/BBWC instead of the data listed for 158 gr SWC?
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Old March 12, 2007, 09:25 AM   #2
ledavatar
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Are you sure you can't get 148gr SWC data instead? HB bullets go pretty deep in the brass so the case volume may be very different.
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Old March 12, 2007, 10:39 AM   #3
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Hollow Base wadcutter data is not the same as bevel base or double ended wadcutter data.

Unless your bullets are hollow base, you should use the DEWC or BBWC data for loading.

Hollow base wadcutters are their own animal. with their own loading data.
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Old March 12, 2007, 10:50 AM   #4
garbageman
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Had not thought about the HB/BB/DEWC being flush with the case mouth, that would be a different animal than SWC.

I checked all three of my books and none listed 148 gr SWC.

I will check the Powder web sites for more info.
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Old March 12, 2007, 05:33 PM   #5
inkie
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garbageman

I checked a lot of old loading data can;t find 148SWC only 158 grain. This may help if you load up these old recommended loads for 158 SWC it will be safe for 148 SWC. 6.3 Bludot and 4.8 Unique. Loads number 44 and 45. NRA .loads for .38 special
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Old March 12, 2007, 06:54 PM   #6
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I would use lighter than max anyway with that bullet and 158 loading tables will work.
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