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Found 1 result

  1. I have a Tanfo Stock II Elite in 9mm I bought from PD earlier this year, and I have struggled with light strikes using factory ammo continuously. I’ve read through those related posts on this forum, repeatedly – but haven’t found a solution for my gun. I’m looking for confirmations on others who are running similar configurations, with *factory ammo* and also soliciting other suggestions (aside from reloading related solutions). I keep a detailed record of my gun, so I’ve tried to summarize my config and what I’ve done to debug this below. First, the gun was purchased NEW from PD earlier this year. I had Joe at PD do the following, before I first received the gun: Tanfoglio Tune: Polishing & Assembly, Barrel Reaming, PD Hammer springs, PD Firing Pin Spring, Reduced Sear & Reduced Trigger return springs Titan Hammer Sear BOLO Interrupter, BOLO pin Firing Pin Safety Block PD Optimized firing pin-extended PD Optimized Aluminum Guide Rod – Hard Anodized Coating EAA Witness Fullsize RP Recoil 9 lb (Wolf 49709) Initially started with PD 14 lb hammer spring Basically from day 1, I was unable to get the gun to fire any factory ammo without light strikes. They were usually in DA pulls, not in SA. At Joe’s recommendation, I bought a wide range of factory ammo and started testing. I tried Winchester white box, Freedom Munitions 147, Blazer Brass 115, Stand 1 Chubbies, Stand 1 full power, etc. I tested them all in DA modes, some failed much more frequently than others, but none of them could get below a 1% failure rate with 150 rounds. The ammo that performed the best, was Freedom Munitions 147gr. Winchester white box was one of the worse ones for me – which confused me since I started hearing people explain that Winchester and Federal primers are “softer” and easier to ignite. Eventually, Joe offered to re-examine the gun, ream the barrel again and look things over. I was also having a problem with failure-to-extracts, which Joe successfully resolved at this point by installing a higher power extractor spring, and doing some additional reaming of the extractor area. After Joe’s 2nd reaming and testing, he suggested we go up to a 15.5lb hammer spring and returned the gun to me. At first the light strikes were infrequent, but they increased as time went by. They also started happening in SA mode instead of just DA. Joe explained that the hammer spring would lose 20% of its power at 5K rounds and continue degrading from there. I attributed the increase FTF with the fact that the hammer spring was at 7K rounds, and I put a new one in. I also installed a fresh PD optimized firing pin spring at this same time – since the original one was close to 10K rounds at this point. My light strikes went up immediately following the install of these 2 new springs! Ever since then, I’ve been trying to resolve these light strikes. I have tried: 4 different firing pins (Henning G5, Xtreme, PD and factory) – with minimal difference I have also now trimmed my PD firing pin spring, removing around 7-8 coils (any further trimming and the spring gets stuck) I removed the firing pin safety block, and found no difference by doing that I also did another test of a wide range of factory ammo, and have started using Winchester “Train” ammo and found it to work better than the other ammo the pencil test, and confirmed the firing pin kicks my pencil a couple feet into the air (a friend who works on CZ’s a lot says mine goes 8-10” higher than his) I clean my gun pretty frequently, at least every 1,200 to 1,500 rounds – but because I’m frequently trying different springs/pins I usually end up cleaning it every 300-800 rounds I don’t use “grease” except a dab on the sear and trigger return springs, everywhere else I use oil. Currently I run my firing pin & fp spring without any oil/lube So, I’d like to hear from those who have a Tanfo Stock II Elite (large frame) 9mm, *especially* those who use factory ammo: What config do you have in your gun, especially hammer spring (brand and strength), firing pin brand & firing pin spring brand What factory ammo do you use, and how often (if at all) do you have light strikes? What is the pull weight of your DA trigger, with whichever hammer springs you use? Do you put any oil on your firing pin or firing pin spring? Again, I don’t have a press and I’m wanting to initially resolve this without going to reloading as a fix. I may go there later, but for now please assume reloading is not an option. Finally - a THANK YOU in advance to any insights / help you might be able to lend.. I am running out of ideas!
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