Shotgun ammunition is measured in gauge rather than in caliber. Ammunition manufactured for them comes in a variety of types, sizes and power. We explain all here
Shotgun Ammunition. Reliable Gun: Firearms, Ammunition & Outdoor
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Bear Arms AS46 Mag Fed Pump 12GA Shotgun OD Green - Siwash Sports
S&W 380 EZ - A 3 in 1 Women's Gun Review - The Well Armed Woman
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Shotgun Ammunition. Reliable Gun: Firearms, Ammunition & Outdoor
Shotgun Ammunition. Reliable Gun: Firearms, Ammunition & Outdoor
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Ballistic Machinist 357 Defender Slugs (Box of 5) - Detroit Ammo Co.
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Federal Power Shok 20 Gauge 3-in 00-12 Pellet Buckshot Shotgun
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Federal 12-Gauge 1-1/8 oz, 2-3/4-in, 3 Dram #7.5 Lead Shotgun