MCRP 12-10B.1, page 259

Target Loophole Breach Hole 3-inch brick wall at 0-degree obliquity 22 rounds 75 rounds 3-inch brick wall at 45-degree obliquity 22 rounds 351 rounds 5-inch brick wall at 0-degree obliquity 32 rounds 501 rounds 8-inch reinforced concrete at 0-degree obliquity 22 rounds 75 rounds (Note: Reinforcing rods still in place) 8-inch reinforced concrete at 45-degree obliquity 22 rounds 401 rounds (Note: Reinforcing rods still in place) 1 Obliquity and depth tend to increase the amount of wall material removed. Table B-10. Breaching Effects of APDS-T Rounds (a) When firing single rounds, the APDS-T round provides the greatest capability for behind-the-wall incapacitation. The APDS-T round can penetrate more than 16 inches of reinforced concrete with enough energy left to cause enemy casualties. It penetrates through both sides of a wood-framed or brick veneer building. Field fortifications are easily penetrated by APDS-T rounds. Table B-11 lists the number of APDS-T rounds needed to create different-sized holes in commonly found bunkers. (b) The APDS-T round creates a hazardous situation for exposed personnel because of the pieces of sabot that are thrown off of the round. Type Bunker Obliquity Penetration Loophole Small Breach Hole 36-inch sand/timber 0 degree 1 round 25 rounds 40 rounds 36-inch sand/6-inch concrete 0 degree 6 rounds 6 rounds 20 rounds Table B-11. Number of APDS-T Rounds Needed To Create Different-Sized Holes in Bunkers WARNING Personnel not under cover forward of the 25-mm gun’s muzzle and within the danger zone could be injured or killed by these sabots, even if the penetrator passes overhead to hit the target. Military Operations on Urbanized Terrain B - 27