page_title: Bourrelet
hierarchical_section_title: Bourrelet
caption_attribution_description: English: Artillery shell used by Finnish army in 150 H 14 J (Japanese Type 38 15cm Howitzer) in Hämeenlinna artillery museum. The actual calibre is 149.1 mm. Designation 150 mm short, old type, trotyl shell, fuze hole 32/41, model 34, zinc driving band. This shell could also be used with other 149.1 mm howitzers, 150 H 15 (15 cm Schwere Felthaubitze 15) and 150 H 06 (15 cm Positionshaubits m/06). Suomi: Suomen armeijan 150 H 14 J (Japanilainen tyyppi 38 15 cm) haupitsissa käyttämä kranaatti Hämeenlinnan tykistömuseossa. Varsinainen kaliiperi on 149,1 mm. Nimike 150 mm:n lyhyt, vanhanmallinen trotyylitäytteinen kranaatti, sytytintila 32/41, mallia 34, sinkkinen johtorengas. Ammusta voitiin käyttää myös muissa 149,1 mm haupitseissa: 150 H 15 (15 cm Schwere Felthaubitze 15) ja 150 H 06 (15 cm Positionshaubits m/06).
context_page_description: The bourrelet is the portion of an elongated artillery projectile having a very slightly smaller diameter than the interior diameter of the barrel through which that projectile is to be propelled. The bourrelet is typically precisely machined to a specified diameter after the remainder of the cast projectile body has been roughly machined to a smaller diameter. The bourrelet is normally forward of a rotating band or driving band near the aft end of the projectile. The rotating or driving band is customarily made of a softer metal than the remainder of the artillery projectile and of a larger diameter than the bourrelet to seal the barrel and be engraved by the rifling to spin-stabilize the projectile in flight. The bourrelet is not engraved by the rifling, but is supported by the lands between the rifling to align the long axis of the projectile with the axis of the artillery bore.
context_section_description: The bourrelet is the portion of an elongated artillery projectile having a very slightly smaller diameter than the interior diameter of the barrel through which that projectile is to be propelled. The bourrelet is typically precisely machined to a specified diameter after the remainder of the cast projectile body has been roughly machined to a smaller diameter. The bourrelet is normally forward of a rotating band or driving band near the aft end of the projectile. The rotating or driving band is customarily made of a softer metal than the remainder of the artillery projectile and of a larger diameter than the bourrelet to seal the barrel and be engraved by the rifling to spin-stabilize the projectile in flight. The bourrelet is not engraved by the rifling, but is supported by the lands between the rifling to align the long axis of the projectile with the axis of the artillery bore.
caption: The unpainted bourrelet is between the yellow and black paint while the copper rotating band is near the bottom of the projectile.
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