Bullet & Barrel Size Comparison: 9mm Luger
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9MM Luger Bullet
Did you know that an unfired 9mm bullet will not fit through the barrel of a 9mm gun (not without a lot of force anyway)? Out of curiosity I took an unfired 9mm Luger plated bullet and placed it in the barrel of a 9mm Glock 26 just to see how closely it would fit inside the barrel.
I then took a new live factory round of Blazer Brass 9mm 155gr FMJ and tried to place it into the muzzle of a Glock 26. It too would not fit. The barrel rifling was stopping the bullet from passing through the barrel.
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9mm Luger Factory Blazer Brass Bullet won't fit into muzzle of Glock 26. |
Unfired 9mm Luger bullet fits into the chamber of a Glock 26 but not the barrel. |
I emailed a friend with these photos and he responded.. "I do not believe any bullet will fit into the respective caliber barrel muzzle. The bullet should be a line to line fit with the barrel between the rifling. The rifling should then displace the lead causing the bullet to spin as it traverses the barrel."
I then measured the diameter of the bullets and compared them to the inner diameter of the Glock 26 barrel. According to my measurements (which may not be 100% accurate):
Berry's plated bullet dia. = .3560"
Blazer Brass bullet dia. = .3530"
Inner diameter between rifling = .3550"
Inner diameter at rifling = .3415"








