hlpressley Posted January 31, 2019 Share Posted January 31, 2019 Hey guys I am experiencing some light primer strikes with the SP-01 CO gun that has been completely worked over by CZC. Gun ran fine for probably 1,000 rounds or so but all of a sudden at my last match it began to light strike. It does have the 8.5lb hammer spring but I’m also only using Federal primers that are seated as deep as the Dillon 650 will go. I have checked everything that I know to check. Am I destined to run the 11.5lb hammer spring and Federal primers? Link to comment Share on other sites More sharing options...
Rnlinebacker Posted January 31, 2019 Share Posted January 31, 2019 Hey guys I am experiencing some light primer strikes with the SP-01 CO gun that has been completely worked over by CZC. Gun ran fine for probably 1,000 rounds or so but all of a sudden at my last match it began to light strike. It does have the 8.5lb hammer spring but I’m also only using Federal primers that are seated as deep as the Dillon 650 will go. I have checked everything that I know to check. Am I destined to run the 11.5lb hammer spring and Federal primers? pull out the firing pin and clean the channel. also, check if the firing pin spring is broke and/or the firing pin itselfSent from my SM-N950U using Tapatalk Link to comment Share on other sites More sharing options...
hlpressley Posted January 31, 2019 Author Share Posted January 31, 2019 1 minute ago, Rnlinebacker said: pull out the firing pin and clean the channel. also, check if the firing pin spring is broke and/or the firing pin itself Sent from my SM-N950U using Tapatalk Thanks. I’ve actually already checked these and both seem to be fine. My next step is to order an extended firing pin from CGW to see if that would help. I’m not sure if CZC installed one when they performed the work or not. The interesting part is that the gun worked fine for the first 1k or so rounds. Link to comment Share on other sites More sharing options...
Rnlinebacker Posted January 31, 2019 Share Posted January 31, 2019 Thanks. I’ve actually already checked these and both seem to be fine. My next step is to order an extended firing pin from CGW to see if that would help. I’m not sure if CZC installed one when they performed the work or not. The interesting part is that the gun worked fine for the first 1k or so rounds. what? they worked it over and didn't install the extended firing pin [emoji2955][emoji2955]. did they offer the option? Sent from my SM-N950U using Tapatalk Link to comment Share on other sites More sharing options...
hlpressley Posted January 31, 2019 Author Share Posted January 31, 2019 I purchased the gun used from a member here on the forum. I didn’t have the work done myself. He sent me a copy of the receipt for the work performed but it doesn’t mention an extended firing pin. Link to comment Share on other sites More sharing options...
bulm540 Posted January 31, 2019 Share Posted January 31, 2019 Try an 11 # hammer spring. Link to comment Share on other sites More sharing options...
hlpressley Posted January 31, 2019 Author Share Posted January 31, 2019 30 minutes ago, bulm540 said: Try an 11 # hammer spring. Was hoping to avoid that. Other CZ’s that I have work great with 8.5lb hammer springs and Federal primers. I think I may try a new extended firing pin first. Link to comment Share on other sites More sharing options...
Polymer Posted January 31, 2019 Share Posted January 31, 2019 Make sure there is extended firing pin with reduced power firing pin spring also. Link to comment Share on other sites More sharing options...
Ken6PPC Posted January 31, 2019 Share Posted January 31, 2019 (edited) 2 hours ago, hlpressley said: Hey guys I am experiencing some light primer strikes with the SP-01 CO gun that has been completely worked over by CZC. Gun ran fine for probably 1,000 rounds or so but all of a sudden at my last match it began to light strike. It does have the 8.5lb hammer spring but I’m also only using Federal primers that are seated as deep as the Dillon 650 will go. I have checked everything that I know to check. Am I destined to run the 11.5lb hammer spring and Federal primers? I had a similar situation. Pistol ran fine for ~1000 rounds, and then started having light strikes. My problem turned out to be a defective firing pin spring that didn't keep the impact end of the firing pin back far enough. A new spring held the firing pin further to the rear, with more sticking out of the firing pin stop. This allowed more hammer energy to be transferred to the firing pin, curing the light strikes. Check to see if the firing pin extends further through the rear of the firing pin stop when you hold the muzzle up than when it is muzzle down. If it does, you need a new firing pin spring. There was a batch of bad reduced power firing pin springs out a while back. They would take a "set" after some use, and then would not keep the firing pin spring back far enough. If your firing pin measures longer than 2.480", you already have an extended firing pin. Edited January 31, 2019 by Ken6PPC Link to comment Share on other sites More sharing options...
hlpressley Posted January 31, 2019 Author Share Posted January 31, 2019 Thanks guys. I appreciate all of the feedback. I will give these ideas a shot. Link to comment Share on other sites More sharing options...
abb1 Posted January 31, 2019 Share Posted January 31, 2019 I would definitely get an extended firing pin. I personally would also not go lighter than an 11.5# main spring. I know others do, but for me the benefits of 100% reliability over a half pound lighter pull has priority. Link to comment Share on other sites More sharing options...
George16 Posted January 31, 2019 Share Posted January 31, 2019 38 minutes ago, abb1 said: I would definitely get an extended firing pin. I personally would also not go lighter than an 11.5# main spring. I know others do, but for me the benefits of 100% reliability over a half pound lighter pull has priority. This. I tried the 8# spring and while it works with the extended firing pinand reduced firing pin spring, I have to use federal primers which are a pain to find. So I went with the 11.5# from CGW along with the ext firing pinand reduced firing pin spring and it lights off any brand of primers 100%. I even experimented by installing the stock firing pin and stock spring and it too lit off all the primers (CCi, WSP, Fiocchi and Remington) I used with my reloads. Link to comment Share on other sites More sharing options...
Furrly Posted January 31, 2019 Share Posted January 31, 2019 8.5# is very light Link to comment Share on other sites More sharing options...
robchavous Posted January 31, 2019 Share Posted January 31, 2019 Yeah you probably don't have an extended FP. I also agree with others that using the 8.5 and being tied to Federal primers isn't the best course. The 11.5 with an extended FP will set off anything reliably. Sent from my Pixel 3 XL using Tapatalk Link to comment Share on other sites More sharing options...
hlpressley Posted January 31, 2019 Author Share Posted January 31, 2019 (edited) Thanks everyone. I ordered an extended firing pin as well as a few other items from CGW today. I will update with my findings. Edited January 31, 2019 by hlpressley Link to comment Share on other sites More sharing options...
Lastcat Posted January 31, 2019 Share Posted January 31, 2019 44 minutes ago, hlpressley said: Thanks everyone. I ordered an extended firing pin as well as a few other items from CGW today. I will update with my findings. Hope it all goes well, keep us posted, best of luck. Link to comment Share on other sites More sharing options...
hlpressley Posted February 1, 2019 Author Share Posted February 1, 2019 57 minutes ago, Lastcat said: Hope it all goes well, keep us posted, best of luck. Thank you sir! I definitely will. Thanks again for all of the suggestions and feedback. Link to comment Share on other sites More sharing options...
vrwm Posted February 1, 2019 Share Posted February 1, 2019 Did you check your hammer to sear clearance? It is possible that one of the adjustment screws on the trigger backed out if you had them installed and it’s dragging. Link to comment Share on other sites More sharing options...
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