KHGS wrote:Pommy Chris wrote:DannyS wrote:Whether decocked or not, firing pin springs can still loose their strength. De- cocking will help but the spring is still under tension.
True, but if Barnard spring is worn out in 4 years just being under tension then it is not a good spring. There are military actions with 50 year old springs which are still hitting very hard with no miss fires. Either Barnard are making springs out of old coat hangers or CCI are the problem.
Chris
Technically you are not correct. Military actions have long firing pin falls (read long locktimes) which does not enhance fine accuracy, but does make them more reliable in the ignition stakes. The shorter the pin fall (faster lock time) the less reliable the firing pin spring will be and the more often they should be replaced. A good rule of thumb is to have the firing pin spring replaced with a new barrel. Usually subtle accuracy issues will begin to occur before misfiring occurs.
All primer manufacturers produce faulty batches of primers from time to time, I have seen faulty batches across all of the major manufacturers.
I have found that small rifle primers do not like excessive preload. I had a customers 223 target rifle come in with a misfiring problem, which persisted after replacing the firing pin spring, long story short, the rifle could be made to misfire with any primer depending on how the primer was seated, it took some time & head scratching to get to the bottom of that one!!!
Keith H.
Point I was making is you can make a spring from same material as valve springs in cars and some do, these springs basically last forever.
Chris