What are the similarities between the standard brass-cased and composite .308 cartridges?

Composite Cartridge Performance and Efficiency

Interactive Video
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Physics
•
10th - 12th Grade
•
Hard

Patricia Brown
FREE Resource
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9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Different ballistic performance
Different projectile types
Same length and projectile
Different powder and primer
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the internal profile of a composite cartridge differ from a brass cartridge?
It follows the external profile
It is dictated by the chamber
It is shaped by the molding process
It is identical to a brass cartridge
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of a consistent molding process in composite cartridges?
Inconsistent rounds
Tighter velocity deviations
Wider dispersion on target
Higher powder usage
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What advantage does a composite cartridge have in terms of powder usage?
Requires more heat transfer
Uses more powder for the same output
Uses less powder for the same output
Produces less ballistic performance
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the combustion of powder in composite cartridges compare to brass cartridges?
No combustion
More complete combustion
Same level of combustion
Less complete combustion
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role does the polymer case play in heat transfer during the ballistic event?
Transfers more heat
Increases chamber temperature
Acts as an insulator
Acts as a conductor
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the energy transfer in composite cartridges affect powder usage?
Decreases powder usage
Requires more powder for same ballistics
Increases powder usage
Has no effect on powder usage
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the impact of less heat transfer in composite cartridges on energy efficiency?
Reduces energy efficiency
Increases energy efficiency
Has no impact on energy efficiency
Requires more energy input
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary benefit of using less powder in composite cartridges?
Increased recoil
Reduced ballistic performance
Same ballistic performance with less input
Higher chamber temperature
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