cast bullet labeled .358" 180gr. but weighs 170 - Handguns and Ammunition Forums
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Old 10-06-2019, 01:06 PM   #1
Join Date: Jan 2012
Location: Colorado
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cast bullet labeled .358" 180gr. but weighs 170

Uncovered a stash of ABC cast bullets from years ago. They are labeled .358" 180gr. TC but weigh 170. gr. *Would a high alloy mix account for 10 gr. of weight? Do I load for 180gr. or 170gr.? Planning on using 13 gr. of 2400. Sound right?
Thanks in advance, dgang
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Old 10-06-2019, 03:46 PM   #2
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Join Date: Feb 2011
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If it were me, I would weigh about 10-20 of these cast bullets and find the average weight of them......then load according to the average weight. I assume that you are loading these .358in. lead bullets in 357Mag brass. Since you don't know the Brinnell hardness of them, I would load a few(10-12) light, and see if I was getting any barrel leading. If these bullets are "soft" and you load them "hot", you will have a bore that is leaded soooo bad it will look like a smooth bore. Just a thought.
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