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USN 20x197 test round

SG500

SG500

Well-Known Member
Premium Member
Now for something you don't see too often.
The 20x197 USN was used for testing the performance of fuzes at high speed. Its a necked down USN 28x198 anti aircraft round.
The photo shows both types of round.
Dave.
 

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  • 20mm USN.jpg
    20mm USN.jpg
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