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BAD groups----need help

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#18

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10-29-2010, 10:50 PM

N310toN170 N310toN170 is offline

N310toN170 is offline

Senior Member

Join Date: Jan 2010

Posts: 118

Watch for neck thickness and neck tension issues, especially with faster powders trying to keep sub speeds. The slower powders have time to build speed after the bullet has engaged the rifling and its less of an issue.

Measure the thickness if you can and shoot over a chrono. SD and ES numbers really impact groups when you're below the speed of sound.

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