|I tested this ammo as well as some from Mag Tech and was sprely disapointed. Regardless of the fragility of the bullet's construction, sometimes it would not fragment and would retain the bulk of the shot charge within the jacket. on a few instances the fore-section of the bullet broke away and left a profile much like a wadcutter. These rounds penetrated way too deep for a defensive load.
Keep in mind that nothing is perfect. I have spent a good deal of mony on these founds in differant calibers and have had much the same results across the board. When they preform properly they make a massive, shallow wound. When they dont, they poke through like ball ammo.
If you want guarnteed expansion, or as close as you can get to it, look at Cor-Bon Pow'rBall and Federal Expanding Full Metal Jacket. The EFMJ is my personal favorite in my guns that feed it 100%. The Pow'rBall is a near second.|