Adrenaline Posted January 18, 2019 Share Posted January 18, 2019 Federal match primers I know are soft but am stumped on this. 4.3 gr of hp38 124 gr MG seated at 1.1550. I had 3 very minor punctures like barely. Did not damage breech face or striker. Striker looks perfect so I dont know what the cause is. Any ideas. Link to comment Share on other sites More sharing options...
4n2t0 Posted January 18, 2019 Share Posted January 18, 2019 What gun? Link to comment Share on other sites More sharing options...
Adrenaline Posted January 18, 2019 Author Share Posted January 18, 2019 Sorry. Glock Link to comment Share on other sites More sharing options...
4n2t0 Posted January 18, 2019 Share Posted January 18, 2019 Did you keep the cases? How does the flash hole look? I'd also recommend removing the striker and cleaning the firing pin channel if you haven't done so already. Link to comment Share on other sites More sharing options...
lgh Posted January 18, 2019 Share Posted January 18, 2019 Do you mean there was a failure to ignite? Single headstamp? Gazillion reloads through the brass? Carefully examine the case. The answer might be there. Link to comment Share on other sites More sharing options...
theWacoKid Posted January 18, 2019 Share Posted January 18, 2019 Not gonna hurt much if it happens every now and then. You have to consider that a soft primer struck with a healthy blow from a striker or firing pin that maybe even has a sharp or high spot can really thin out a spot in the cup that can't quite hold up. It happens. Deal with it, change your primer strike, or change your primer. Link to comment Share on other sites More sharing options...
4n2t0 Posted January 18, 2019 Share Posted January 18, 2019 (edited) How did you come up with that OAL? Is it a Gen5 Glock? Generally the only thing that limits a Glocks OAL is the magazine but I've heard (I don't own one) that the new marksman barrels are a little tighter. Did the rounds plunk and spin? If it's not a new Glock what's it's round count? I'm just spit balling... Edited January 18, 2019 by 4n2t0 Link to comment Share on other sites More sharing options...
BallisticianX Posted January 18, 2019 Share Posted January 18, 2019 Your load looks fine. One thing to consider is Glocks have the "picture window" at the breech face striker protrusion and displaces a lot of primer cup into that window upon firing. Comparably the M&P has the tear drop in the same area. Those bigger recessed areas allow more primer metal to flow and weakens/thins the cup. With a softer federal primer add an overzealous striker spring and that could be all it is. Ive picked up a few pieces of range brass with the signature glock and M&P strike and saw residue in the indent on federal case stamps. I noticed it in my own M&P here and there with federals. With CCI primers it would not happen. I put in a reduced striker spring and it ceased happening on federals and still set all others off. Something to consider. Link to comment Share on other sites More sharing options...
Adrenaline Posted January 20, 2019 Author Share Posted January 20, 2019 If this continues to happen couldnt it cause the breech face/striker to erode? I was thinking and these shells were on their 3rd load. The first loads were 6.6 gr hs6 and the last 2 were hp38 at 4.4 to 4.5 gr all loads were 1.1550 +/- .0020. Maybe the cases were getting tired?? Link to comment Share on other sites More sharing options...
4n2t0 Posted January 20, 2019 Share Posted January 20, 2019 (edited) 27 minutes ago, Adrenaline said: If this continues to happen couldnt it cause the breech face/striker to erode? I was thinking and these shells were on their 3rd load. The first loads were 6.6 gr hs6 and the last 2 were hp38 at 4.4 to 4.5 gr all loads were 1.1550 +/- .0020. Maybe the cases were getting tired?? My cases get "tired" when they split. So much for answering all those questions, lol. I'm done trying, you'll figure it out eventually. Edited January 20, 2019 by 4n2t0 Link to comment Share on other sites More sharing options...
AHI Posted January 20, 2019 Share Posted January 20, 2019 tired cases would not cause pierced primers. could the cases that have issues have less internal volume thus higher psi. sharp striker ? Link to comment Share on other sites More sharing options...
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