Just picked up my first and only Kahr this week. I bought this P9 new and took it out for the "break-in" period. Of the 100 rounds I put thru the pipe about 10 had light primer strikes and did not fire. Some took 3 tries before they finally went off. I did a search and saw how some people claim Kahrs don't like WWB or UMC. Just so happens that is what I was using. So today I break it down for a good cleaning before my next trip to the range and look what I found. It appears the spring carved some nice grooves in my guide rod. Anyone seen or heard of this before?