Winchester has been in the firearms trade long enough to know that not all ammunition is created equal. There can also be a difference in your practice and training ammo, this is why Winchester devloped the Train and Defend line of ammunition. The Winchester .45ACP 230gr Defender ammunition was designed from the ground up to pair perfectly with the corresponding .45ACP 230gr Training ammo. This allows shooters to have faith that their point of aim, point of impact will not change when using this ammo, made from high quality raw components like the smooth nickel coated caseings, premium powder, primer and proven hollow point design that will feed flawlessly,  penetrate and expand reliably thus stopping the threat sooner.