This YouTube Short explains the 'hourglass effect' (effetto clessidra) primarily associated with 9x21mm ammunition, noting it's an aesthetic characteristic common to conical cases. The video warns that if this effect is improperly addressed, it can lead to functional problems. The creator plans future in-depth videos on the topic and encourages viewers interested in firearms or shooting to subscribe and follow their social media channels. A strong disclaimer emphasizes the dangerous nature of firearms and advises against emulation without proper qualifications.
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