igolfat8 Posted October 16, 2019 Share Posted October 16, 2019 My Gen 5 barrels have a square shoulder, 90* recess just inside the muzzle, Unlike the common 11* chamfer or rounded inward crowns. My Gen 5 crowns are accumulating carbon and gunk QUICKLY. After only 100 rounds the crown is completely invisible. It takes scraping to remove the build up. Is anyone else having or noticing this issue? Link to comment Share on other sites More sharing options...
B_RAD Posted October 16, 2019 Share Posted October 16, 2019 24 minutes ago, igolfat8 said: My Gen 5 barrels have a square shoulder, 90* recess just inside the muzzle, Unlike the common 11* chamfer or rounded inward crowns. My Gen 5 crowns are accumulating carbon and gunk QUICKLY. After only 100 rounds the crown is completely invisible. It takes scraping to remove the build up. Is anyone else having or noticing this issue? Haven’t noticed it. I’ve got a LOT of ammo thru mine. Pics? Link to comment Share on other sites More sharing options...
Sam-ETS Posted October 16, 2019 Share Posted October 16, 2019 Mine acquires some carbon but nothing I would complain about. However, I have upwards of 7-8k through mine without being cleaned. Link to comment Share on other sites More sharing options...
RePete Posted October 16, 2019 Share Posted October 16, 2019 6 hours ago, igolfat8 said: My Gen 5 barrels have a square shoulder, 90* recess just inside the muzzle, Unlike the common 11* chamfer or rounded inward crowns. My Gen 5 crowns are accumulating carbon and gunk QUICKLY. After only 100 rounds the crown is completely invisible. It takes scraping to remove the build up. Is anyone else having or noticing this issue? Are you running lead bullets? Link to comment Share on other sites More sharing options...
igolfat8 Posted October 16, 2019 Author Share Posted October 16, 2019 Yes, I’m running cast lead / powder coated and Hi-Tek coated bullets. Same boolits I’ve shot well over 175,000 through other Glocks and CZs without any issues. I’ve never had any bore leading even in my open 34 and Czechmate. I just find it odd that the Gen 5 muzzle is accumulating carbon build up and so quickly. Link to comment Share on other sites More sharing options...
Southpaw Posted October 16, 2019 Share Posted October 16, 2019 Is it affecting accuracy? Link to comment Share on other sites More sharing options...
floater Posted October 18, 2019 Share Posted October 18, 2019 1.5 years on a gen 5 17 with 147 blues and sport pistol and nothing more than a bore snake every month or so are have not see any build up of any kind. Link to comment Share on other sites More sharing options...
wtturn Posted October 18, 2019 Share Posted October 18, 2019 I clean the crown periodically with a dental pick and a pure copper scrub pad. Link to comment Share on other sites More sharing options...
Effectus Magis Per Minor Posted October 18, 2019 Share Posted October 18, 2019 My gen 5 34 has the same build up on the crown shooting blue bullets. I have not noticed it affecting accuracy but I do scrape it off when I clean the pistol. Link to comment Share on other sites More sharing options...
B_RAD Posted November 4, 2019 Share Posted November 4, 2019 I have been noticing that my main 34 has been losing some accuracy. My back up has not. Looking at the crowns, the problem 34 has quite a bit more build up. Hmmmm.... Link to comment Share on other sites More sharing options...
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