12 Gauge Shot Pattern & Penetration. 00 Buckshot vs #4 Buckshot vs 7.5 Birdshot - TheFireArmGuy
This review compares 12-gauge 00 buckshot, #4 buckshot, and 7.5 birdshot using a Mossberg 930. 00 buckshot demonstrated a tight 3-inch pattern at 6 yards and penetrated 4-5 layers of OSB. #4 buckshot spread to 5 inches and was less effective. Birdshot destroyed lighter materials but failed to penetrate dense surfaces like buckshot.









