mont1120 Posted October 21, 2015 Share Posted October 21, 2015 Quick history, this is an XDM 4,5, in 40 cal which is now fitted with a Storm Lake 9MM barrel for 3 gun. I replaced the old trigger with a new PRP system from Brownells, and what a wonderful trigger PRP makes. Makes the gun that much better. My problem now is light primer strikes. I am sure I must have done something wrong on the install, but can't figure out what the problem is. 1. It is not high primers, I checked that very close. 2. Not the ammo because I have tried six different loads with three different primer types, all fail. 3. The gun worked fine before I put the trigger in. 4. OAL does not matter. 5. The firing pin channel is very clean, no build up of powder or gunk. This happens about every fourth round. You can visually see the firing pin strike is not deep enough. I can load the same unfired round back into the gun and it goes off. Do I need a lighter spring system? I am suspecting I have done something wrong when I installed the new trigger system, any ideas? Link to comment Share on other sites More sharing options...
1steelshooter Posted October 21, 2015 Share Posted October 21, 2015 If the PRP kit includes a lighter striker spring try putting the stock spring back in. I know on my CZs if I go with too light of hammer spring I will get light strikes with a stock firing pin. Link to comment Share on other sites More sharing options...
Out of Ammo Posted October 22, 2015 Share Posted October 22, 2015 I have an XDM and had a similar problem. I was told that the problem might be the guiderod spring. That solved the problem. Link to comment Share on other sites More sharing options...
technetium-99m Posted October 22, 2015 Share Posted October 22, 2015 On an XD the recoil spring and striker spring "fight" each other somewhat. I'm not sure what the PRP kit consists of, but a worn out recoil spring can cause all kinds of light strikes. Link to comment Share on other sites More sharing options...
mont1120 Posted October 22, 2015 Author Share Posted October 22, 2015 I ordered new springs today, I'll let everyone know how it goes, thanks. Link to comment Share on other sites More sharing options...
thejez Posted November 3, 2015 Share Posted November 3, 2015 I had a similar issue and bought the xd spring kit from wolff. That kit comes with a new striker spring and 3 different weighted recoil springs. I put in the stronger striker spring and the 16lb recoil and haven't had any issues since. Link to comment Share on other sites More sharing options...
mont1120 Posted November 5, 2015 Author Share Posted November 5, 2015 You guys were right. I put in the Wolff 14 lb spring set and off the ol girl ran like a top. And since it is 18 degrees outside when I tested it, I know it runs in the cold. Thanks to everyone for the help. Link to comment Share on other sites More sharing options...
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