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From Warhammer 40k - Lexicanum
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[[File:Heavy Bolter - Astartes MK IVc.jpg|right|thumb|Heavy bolter, with Belt Feed]]
Bolt weapons fire caseless{{Fn|20}} self-propelled mass-reactive shells known as ''bolts'', which are timed to explode just after penetration for maximum lethality. The standard bolt is .75 calibre with a super-dense metallic core and [[diamantine]] tip. Overall bolt ammunition is expensive and difficult to manufacture and the weapons themselves regularly require maintenance and rituals to appease their spirits, but they are no doubt terrifying and destructive weapons.{{Fn|1}}
Each bolt is contained within a cartridge which includes a small conventional powder charge. When fired, this charge launches the bolt while simultaneously igniting its solid fuel propellant, which is timed to do so once it is clear of the barrel. The cartridge is then ejected, clearing the breech for the next round, while the bolt accelerates towards the target under its own power. This system helps alleviate the problem in using rocket-propelled munitions, as the gases are not trapped within the barrel and cannot cause problems due to over-pressure. The two-stage process also keeps the weapon's recoil to manageable levels, compared to conventional weapons of similar calibre.{{Fn|4}}
**{{Endn|19a}}: pg. 213
**{{Endn|19b}}: pg. 218
*{{Endn|20}}: [[Liber Astartes]], pg.130
[[Category:Weapons (Bolt)| ]]
