I use Corbon Pow'r Ball ammo in my Colt Defender because of the 3" barrel. The polymer ball pushes the hollow point open under the reduced velocity achieved from the abreviated barrel.
I figure it has a 9mm velocity, a .40 S&W bullet weight, and a .45 ACP diameter. What's the down side?
Firearm was semi-automatic action with 3.8" barrel length
Shot 1 - Penetrated to 10.9". Average recovered diameter 0.659".
Shot 2 - Penetrated to 12.6". Average recovered diameter 0.687".
Shot 3 - Penetrated to 11.8". Average recovered diameter 0.698".
Shot 4 - Penetrated to 12.2". Average recovered diameter 0.668".
Shot 5 - Penetrated to 11.4". Average recovered diameter 0.684".
Average diameter = 0.679". Average penetration depth = 11.8"
gelatin test data from
http://www.brassfetcher.com/.45ACP%2...;r%20Ball.html