I loaded up a couple of different .44 mag loads for my S&W 629. The components are new Starline brass, 240g bullets, Unique, and CCI 350 primers. Accuracy is very good and I have no problems when firing in single action. However, when I fire in double action, approximately 10% of the rounds fail to fire. I need two strikes on the primer to get them to go off. I realize that the hammer has less inertia when firing in double action, but how can I correct this problem? I'm going on a bear hunt in a few weeks, and I need to fix this fast. Thanks.