Cartridge : 80gr +P Glaser Safety Slug 'silver' pre-fragmented bullet (Part # 02400) Firearm : Smith and Wesson .38 Special with 4" barrel length Block calibration : 10.3cm @ 605 ft/sec (No attempt at correction was made, due to the fragmenting/irregular shaped nature of the penetrating projectiles) Shot 1 - Impacted the block at 1154 ft/sec. Shot was (inadvertently) placed low on the block... likely causing projectile/sub-projectile interaction with the wooden surface of the test bench. Partial fragmentation took place, with the retainment of ~ one-half the sub-projectiles within the jacket shell. The average penetration of the shot balls that did separate from the bullet was 9.0". Deepest penetration of the main body of the Safety Slug was 10.8". Track is outlined in blue in photograph. Please note that the blue outlining is meant, in this case, to highlight the paths of the sub-projectiles - past 6.0" depth the tissue damage done by these projectiles is minimal due to the distance that separates them and their small diameters. Shot 2 - Impacted at unknown velocity. The ball that plugged the shot-filled cavity was recovered at 1.6" depth. Except for two shot balls that fragmented from the main body of the bullet, the projectile stayed intact and penetrated 16.5" of ballistic gelatin and ~ 1" of polyester bullet arresting box. Track is outlined in green. Talk with other shooters about this test on The High Road.org : www.thehighroad.org