cannelure


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cannelure

[′kan·əl·u̇r]
(ordnance)
A groove in a bullet which contains a lubricant, or into which the cartridge is crimped.
A groove in a cartridge case providing a purchase for the extractor.
A ringlike groove for locking the jacket of an armor-piercing bullet to the core.
A ringlike groove in the rotating band of a gun projectile to lessen the resistance offered to the gun rifling and to prevent fringing grooves.
References in periodicals archive ?
It had a brass rimless case with a bullet-seating cannelure, and was loaded with a 230-grain, cupronickel-jacketed bullet traveling at 800 fps.
These were necked down to 7mm and loaded with a 7mm bullet whose crimping cannelure was closer to the bullet's base then was usual.
A few forming operations later--steps that give a particular curve to the nose, punch in any hollow point, possibly press a cannelure around the waist and then usually a final sizing--you'd have a finished bullet.
If the bullet can be inserted up to the case neck or cannelure on the bullet the barrel is excessively worn and needs to be replaced.
<< Des chasseurs de la fin de l'age glaciaire dans la region du lac Megantic : decouverte des premieres pointes a cannelure au Quebec.
Corbin Manufacturing bring high-performance bullet seating to the hobby reloader with their Hand Cannelure Tool.
When it began to yaw, the long 77-grain bullet broke apart at the cannelure and ultimately into four pieces--base, copper nose jacket, and two pieces of lead, all of which penetrated at least 10 inches.
Consequently all .38 WCF bullets--whether lead alloy or jacketed--must have a crimping groove (lead alloy ones) or knurled cannelure (jacketed ones).
There is a cannelure surrounding the bullet jacket a bit back from the nose.
The Super Hammerhead bullet is a bonded bullet that has a thick cannelure. It has all the markings of a superb hunting bullet.
However, after from 2 to 6 inches of penetration, both the M193 (Vietnam era) and M855 (current) full metal jacket (FMJ) projectiles will yaw to 90[degrees], flatten and break apart at the cannelure (crimping groove).