I had a spankin' new Colt Combat Commander that BOB-ed almost every time on the last round with the factory magazine. A Wolff 11-pound/7-round magazine spring cured it.
That's a good gun! Why would they ship that out and risk the Colt reputation? I don't know, but it if that is the answer, I hope Wolff ramps up to making mag springs for the AMT .45 Backup. Maybe I can modify an existing spring for another magazine - any ideas?