The pellets listed below were fired into a fixture used in the FBI 'interior wall' test (two pieces of drywall mounted 3.5" apart to a sturdy frame), to evaluate the effects of firing a similar pellet gun for indoors pest control. All shots were fired at an approximate 90 degree obliquity with respect to the face of the wallboard (reflecting a situation of maximum penetrative potential for the pellet through the wall). The idea here, of course, is to find a pellet that will not go through an interior wall (in the case of a miss) and stitch someone on the other side. An attempt was made to evaluate the velocity of the pellets upon exit from the back of the wallboard, but as you might notice from the performance of these pellets in gelatin (listed under 'airguns' on the menu bar), the velocities of most common pellets that did penetrate both boards should be almost insignificant. Penetration of the pellet completely through both pieces of the drywall constitutes a 'penetration' for the purpose of this test, and is indicated by a 'YES' below. Daisy .177 Max Speed (7.1 gr projectile with steel tip) - Velocity = unk. NO. Gamo .177 Match - Velocity = 526 ft/sec. NO. Gamo .177 Pointed - Velocity = 521 ft/sec. NO. Gamo .177 Hunter - Velocity = unk. YES. Steel .177 BB - Velocity = 532 ft/sec. NO. Lead .177 BB - Velocity = 486 ft/sec. YES. Beeman 0.22 Crow-Magnum (reversed) - Velocity = unk. YES. Beeman 0.22 Silver Bear (reversed) - Velocity = unk. YES. Beeman 0.22 Silver Bear - Velocity = unk. YES. Beeman Silver Jet 0.22 - Velocity = unk. YES. Beeman 0.22 Crow-Magnum - Velocity = unk. YES. Crosman 0.22 Wadcutter - Velocity = unk. YES. Watch out for .22s, I could not find a pellet or range less than 25 yards that would not penetrate the wall, when using a Crosman 2260 air rifle.