Attached: 3AAEB084-1368-4C2B-A3B4-EB5704A8A195.jpg (370x435, 23K)
Why do some bullets have belted indentations like in this picture?
Connor Richardson
Isaac Rogers
Kayden Scott
this, fucking lowIQs this summer
Ryan Morgan
It's so when you shoot an intruder and they run away you can collect the bullet and the perps blood will be stored in the ridges for DNA testing.
Carson Williams
Generally a crimp groove on jacketed rounds, and lube groove for cast lead.
Daniel Price
Cool. Could you exain this further im a noobasauras
Jackson Davis
Im just guessing but its probably for the same reason large caliber pellets and musket bullets are too. For reduced surf contact with the barrel causing less friction and higher velocity.
Ayden Phillips
Interesting. Do the spaces maybe allow room for the bullet to deform into as the rifling lands squeeze it into shape on its way through the barrel?
Nathan Roberts
A lot of brass cases get crimped around the projectile to prevent them from slipping out/in. The crimp lines give you a location to crimp into without marring up the side of the projectile. If you're using cast lead, the lube cuts back on lead fowling I think.
Pic related is a cast lead bullet with lube--a dry waxy substance.
Dominic Young
Im not sure for centerfire projectiles but for the other projectiles, no. It simply keep more material from touching the rifling which reduces friction. If you have a few ribs touching the rifling its easier to push through than if you had the whole length of the bullet making contact.
Nolan Sanders
>flat surfaces have more friction than bumpy ones
Explain sandpaper you retard
Tyler Peterson
ribbed for pleasure
Jonathan Russell
Dominic Myers
Wrong
Aiden Green
Really, sand paper.
OK, try to use a softer sand then the substance you are trying to sand.
Such as trying a bread crumbs on a steel, you will discover that friction is not the same as stonesand on wood.
James Richardson
>bumpy surfaces have less surface area
>flat surfaces have more surface area contacting
Holy shit you are a fucking brainlet.
Dylan Collins
>replying to bait
The real brainlets are always in the comments
Jeremiah Evans
Crimping the jacket over the core helps to prevent jacket separation once it hits the target, ensuring more consistent wound patterns and increasing penetration.
Easton Wright
Jesus christ you obviously failed high school physics.
Benjamin King
OP the groves make it more lethal and are used by police SWAT and military. They are called blood groves and they make the wound more likely to stay open and bleed
Benjamin Phillips
Why/how would grooves prevent jacket separation?
Blake King
Tbh it's probably not bait, he's probably just a kid. Virtually every kid I knew back in the day thought ridgier tired meant better grip.
Anthony Sanders
Its for your pleasure
John White
In the case that user is describing, the bullet jacket is crimped onto the core. The groove you can see doesn't do shit, but if you were to cut through the bullet so you could see the interior you would see that the jacket is compressed into the core at the location of the groove, mechanically locking the two together.
Henry Fisher
You are talking about the bore-rider bullet design.
The point is not friction, rather it's having less metal to engrave rifling onto. Adding those grooves to the bullet resembles the idea of a narrow driving band on an artillery shell.
Daniel Thomas
>lead fowling
I've heard about the "spruce goose" but this is ridiculous!
Jack Bailey
nobody fucking knows, man
Anthony Perry
This happens with bonded jackets.
Brayden Diaz
jacket bonding is a chemical process and has nothing whatsoever to do with a cannelure.
Angel Morgan
Only correct answer.
Justin Walker
The grooves give the jacket material displaced by the rifling somewhere to go. Reducing friction is secondary.
Noah Russell
TSX bullets have no jacket.
They are a bore riding bullet with driving bands. They are too hard to engrave the rifling like a normal bullet.
Wyatt Williams
You have no idea what you're talking about. Just think about it for two seconds. A bore riding bullet wouldn't fit securely in a normally sized case for its caliber, but TSX bullets do.