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September 14, 2014, 04:30 PM | #26 |
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I just read post 10; again.
Maybe some others should do so. Maybe for the first time. |
September 14, 2014, 05:16 PM | #27 | |
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Quote:
There was a European school of thought that said the grooves ought to be deep enough to give the metal displaced by the lands someplace to go. Groove diameter greater than bullet diameter. I don't know if they still do that; I find SAAMI specs but not CIP. Modern American cast bullets are recommended to be slightly larger than groove diameter for a good seal and minimal leading with hard alloys. |
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September 14, 2014, 06:18 PM | #28 |
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I've got best accuracy with 30 caliber bullets being .0005" to .0022" larger than a barrel's groove diameter.
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September 14, 2014, 11:50 PM | #29 | |
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Quote:
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Don't even try it. It's even worse than the internet would lead you to believe. |
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