Rifled ammunition

Rifled ammunition

1. AMMUNITION
BY:
TEJASVI
BHATIA

2. CONTENTS
Definition
Rifle cartridge
•Cartridge case
•Primer
•Propellant
•Projectile
•Lubricants
REFERENCES

3. DEFINITION
An assembly of a case, the propellant , the projectile and the initiation
mixture contained in a container known asshell or cartridge.
According to Indian Arms Act, 1959, Ammunition means:
“Ammunition for any firearm” and includes:-
Rockets, bombs, grenades, shells and other missiles.
Articles designed for torpedo services & submarine mining.
Other articles designed to contain explosive or fissionable material or
noxious liquid or other such thing whether capable of using with firearm or
not.
Such ingredients as the central government may by notification in the
official gazette specify in this behalf.

4. Rifle ammunition
Parts of rifle cartridge are:
Cartridge case
Primer
Propellant
Projectile
Lubricant

5. CARTRIDGE CASE
It is a housing for the primer, the projectile and the powder etc of a
round or cartridge
Brass has been found a particularly good material for shells.
Its function is to expand and seal the chamber against rearward
escape of gases when the cartridge is fired.
Head Stamp: is a series of letters, numbers, symbols or trade
names and is present on the base of cartridge case.

6. On the Basis of
Base of
cartridge
case

7. Tapered wall
On the Basis of
Shape of
cartridge
case

8. Center fire
Rim-fire
Pin fire
On the Basis of
Mode of
ignition

9. PRIMERS
A mixture of initiating ingredients packed in a metallic cup
that sets the propellant on fire.
It consists of:
An initiator, a sensitive explosive
Fuel
Oxidizer and,
Stabilizer
This composition is placed in a percussion cap which are of
two types:
Boxer type
Berdan type

10. BOXER & BERDAN TYPE

11. PROPELLANTS
The explosive material used in cartridges which on burning produce gases
that propel the projectiles out of the barrel of the firearm.
BLACK POWDER (gun powder):is a mixture of potassium nitrate,
charcoal & sulfur.
Until the end of 19
th
century, all cartridges were loaded with black powder.
SMOKELESS POWDER :first synthesized by VIEILLE in 1884.The basic
ingredients are nitrocellulose & nitroglycerin.
When nitrocellulose & nitroglycerine are used in
combination, these are called as double base powders.
SEMI-SMOKELESS POWDER: is a mixture of black powder and
nitrocellulose.

12. Powders
Bulk Powders
Dense Powders
Progressive Powders

13. PROJECTILES
•A part of the cartridge
hurled out by the
gases produced in the
discharge of a firearm
and is intended to
cause injuries
Non-Jacketed
bullets
Semi-Jacketed
bullets
fully-Jacketed
bullets

14. NON-JACKETED BULLETS
Made up of lead alloys
as lead is a soft metal
and can be mixed with
other metals to make it
hard.
Have cannelure.
Cause fouling or
leading of barrel so
these are lubricated to
prevent this effect.
Now a days, lead is
replaced with steel like
in some Russian Rifles.
Round nose
Wad Cutter
Semi-wad
Cutter

15. FULLY-JACKETED BULLETS
Have steel or lead core
covered by an outside
jacket.
Jackets are usually made
up of gilding metal.
Thickness of jacket ranges
from 0.0165-0.030 inches.
Cannelures may be
present in the jacket.
Dum-
dum
Bullets
Conical
Bullets
Stream
Lined
Bullets
Boat-
tailed
Bullets

16. SEMI-JACKETED BULLETS
Have metal jacket open
at the tip of the bullet to
expose the lead core and is
usually closed at the base
Tip of the bullet may be
round or pointed or a semi-
wadcutterconfiguration
Depending on the bullet
design varying degree of
lead is exposed

17. LUBRICANTS
•Bullets are lubricated to reduce friction and
prevent oxidation of the cases or projectiles.
•Lubrication is achieved either by external or
internal lubrication.
•Jacketed bullets do not have any lubricant.

18. References
•Sharma B.R. (1990)’Firearms in criminal
investigation and trials”, universal law publications,
pp 58-78
•Di Miao (1987):”Gunshot wounds”, CRC
publications, NewYork. pp 11-22
•Johari M. (1980):”Monogram on forensic ballistics”,
Govt. of India publishers, New Delhi. pp 9-14
•http://www.firearmsid.com