9mm vs 10mm vs sheet metal
Edwin Sarkissian, an experienced firearms content creator, conducts a practical penetration test comparing 9mm and 10mm calibers against 24-gauge sheet metal. The 9mm round (Glock 17, 115-grain) penetrated 11 sheets, while the 10mm round (Glock 20, Underwood 180-grain at 1300 fps) penetrated 14 sheets. The test highlights the superior penetration power of the 10mm cartridge in this specific scenario, while emphasizing crucial firearm safety procedures throughout.









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