Brush and small limbs will deflect bullets. The degree to which such deflection causes misses depends upon how far the bullet has to travel after hitting the brush before it gets to the tareget. The greater this distance, the larger the degree of the miss. Naturally, the lighter the resistance presented by the stuff the bullet hits, the less the amount of deflection. But twigs as small as 1/4" to 1/2" inch in diameter are plenty to cause a bullet to change direction, or even start to expand!