The angle is indeed different. I had to go with the Stock hammer spring. I kept my trigger right at 2lbs. I am very happy. The 14lb spring was too light at 1.4lbs. What I actually found what was happening is the angle was causing the longer PD springs to actually grab against top of frame strut hole. Not allowing full swing. It did not do this with the skinnier 14lb spring and shorter stock spring. There is a "ledge" inside the frame strut hole that it catches on. If you force the hammer back any way you can see the spring will deform. I had to not just polish, but remove this ledge. Once done, I also had to soften the strut edges and top that holds spring a good bit to prevent binding.