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Block up; obstruct.
- ‘This is an indication that pressure is so low the case is not obturating to completely seal the chamber.’
- ‘The Foster slugs have very shallow rifling and since these slugs obturate in shotgun bores, most of these grooves are ironed out in the process.’
- ‘When it's excessive like that we know that there wasn't even enough pressure to obturate the case at all.’
- ‘Many of today's shooters have tried shooting these old rifles and experienced dismal results when the bullets failed to expand properly and obturate the bore.’
- ‘The idea behind the hollow base was to make it easy for the bullet to obturate and fully engrave the rifling at the very low pressures involved.’
Late 16th century (as obturation): from Latin obturat- ‘stopped up’, from the verb obturare.
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