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- Obturation abstract "In the field of firearms and airguns, obturation denotes necessary barrel blockage or fitment by a deformed soft projectile (obturation in general is closing up an opening). A bullet or pellet, made of soft material and often with a concave base, will flare under the heat and pressure of firing, filling the bore and engaging the barrel's rifling. The mechanism by which an undersized soft-metal projectile enlarges to fill the barrel is, for hollow-base bullets, expansion from gas pressure within the base cavity and, for solid-base bullets, \"upsetting\"—the combined shortening and thickening that occurs when a malleable metal object is struck forcibly at one end. For shotgun shells which have multiple pellets much smaller than the barrel bore, obturation is achieved by placing a plastic wad or biodegradable card of the same diameter as the barrel between the propellant powder and the pellets. More importantly, \"obturation\" refers to the action of a soft metallic cartridge case being pressed outwards against the chamber walls by the high pressure of the internal gases. This creates a self-sealing effect which prevents gasses from leaking out of the breech mechanism, without requiring a complex built-in sealing system. This difficulty with leakage was one of the major obstacles to the early adoption of the breech-loading firearm, as it lowered pressures (and hence velocity), but it also created danger or irritant to the shooter. Although there were early paper-cartridge breechloaders, the self-obdurating nature of metallic cartidges (along with their waterproof nature) led to their rapid and almost universal adoption, in spite of their much greater cost.".
- Obturation wikiPageID "1387010".
- Obturation wikiPageLength "7111".
- Obturation wikiPageOutDegree "34".
- Obturation wikiPageRevisionID "694421048".
- Obturation wikiPageWikiLink .22_CB.
- Obturation wikiPageWikiLink Air_gun.
- Obturation wikiPageWikiLink Breech-loading_weapon.
- Obturation wikiPageWikiLink Brinell_scale.
- Obturation wikiPageWikiLink Bullet.
- Obturation wikiPageWikiLink Category:Ammunition.
- Obturation wikiPageWikiLink Category:Firearm_terminology.
- Obturation wikiPageWikiLink Driving_band.
- Obturation wikiPageWikiLink Firearm.
- Obturation wikiPageWikiLink Gas_check.
- Obturation wikiPageWikiLink Glossary_of_firearms_terms.
- Obturation wikiPageWikiLink Internal_ballistics.
- Obturation wikiPageWikiLink Minié_ball.
- Obturation wikiPageWikiLink Newton_(unit).
- Obturation wikiPageWikiLink Pascal_(unit).
- Obturation wikiPageWikiLink Pellet_(air_gun).
- Obturation wikiPageWikiLink Pistol.
- Obturation wikiPageWikiLink Pounds_per_square_inch.
- Obturation wikiPageWikiLink Quick-firing_gun.
- Obturation wikiPageWikiLink Revolver.
- Obturation wikiPageWikiLink Rifle.
- Obturation wikiPageWikiLink Rifled_breech_loader.
- Obturation wikiPageWikiLink Rifling.
- Obturation wikiPageWikiLink Shotgun_shell.
- Obturation wikiPageWikiLink Shotgun_slug.
- Obturation wikiPageWikiLink Swaging.
- Obturation wikiPageWikiLink Wadcutter.
- Obturation wikiPageWikiLink Wikt:obturation.
- Obturation wikiPageWikiLinkText "Obturation".
- Obturation wikiPageWikiLinkText "act as a gas seal".
- Obturation wikiPageWikiLinkText "obturate".
- Obturation wikiPageWikiLinkText "obturates".
- Obturation wikiPageWikiLinkText "obturating".
- Obturation wikiPageWikiLinkText "obturation".
- Obturation wikiPageWikiLinkText "seals".
- Obturation wikiPageUsesTemplate Template:Reflist.
- Obturation subject Category:Ammunition.
- Obturation subject Category:Firearm_terminology.
- Obturation type Firearm.
- Obturation type Page.
- Obturation comment "In the field of firearms and airguns, obturation denotes necessary barrel blockage or fitment by a deformed soft projectile (obturation in general is closing up an opening). A bullet or pellet, made of soft material and often with a concave base, will flare under the heat and pressure of firing, filling the bore and engaging the barrel's rifling.".
- Obturation label "Obturation".
- Obturation sameAs Q1418751.
- Obturation sameAs Liderung.
- Obturation sameAs Obtiuracija.
- Obturation sameAs Obturação_(armas_de_fogo).
- Obturation sameAs m.04yhm5.
- Obturation sameAs Обтюрация.
- Obturation sameAs Обтюрація.
- Obturation sameAs Q1418751.
- Obturation wasDerivedFrom Obturation?oldid=694421048.
- Obturation isPrimaryTopicOf Obturation.