Name:
per:
Date:
BULLET IDENTIFICATION EXERCISE
1. Go to www.firearmsid.com
2. On the right side, click CLASSROOM LOGIN
3. For log-in key, enter: C10313ForSciH then enter your first & last name
4. Click Accept
5. Under Virtual Comparison Microscope, Click on BULLET ID – VCM
6. Click on BULLET IDENTIFICATION, and answer questions 1 – 3
7. Click on CALIBER, and answer question 4
8. Click on RIFLING, and answer questions 5 - 6
9. Click on RIFLING IMPRESSIONS, and answer question 7
10. Click on TUTORIAL to learn how to use the comparison program
11. Click on EXERCISES, and choose TEST 1, and answer questions
12. After TEST 1, continue on with Test 2, 3, & 4
(Each test should take you around 10 – 15 minutes… don’t spend more time than that)
1. Bullets are examined to determine if the pattern of
found on the bullet match the pattern of
contained in the barrel of the
questioned firearm.
2.
have the potential to be consistently reproduced in a
____________________ pattern on every bullet that passes down the barrel of a firearm.
3. One of the biggest problems in making an identification is that
4.
is a term used to indicate the diameter of a bullet in hundredths of an
inch. A bullet that is 30 hundredths of an inch (.30) in diameter is called a
5. Rifling consists of
6. Draw a diagram showing the difference between a LAND and a GROOVE.
7. A bullet is slightly larger in diameter than the
barrel in which it is designed to be fired. The bore diameter is the
of the
As a result, a rifled barrel will impress a
bullet.
of itself on the sides of the
In the table below, list which STANDARDS matches each unknown (for each test):
TEST #
1
2
3
4
RESULTS:
UNKNOWN #1
UNKNOWN #2
% for Test 1
% for Test 3
UNKNOWN #3
UNKNOWN #4
% for Test 2
% for Test 4