Thread: Throat Erosion - New Barrel

Originally Posted by veitnamcam

Carbon build up is something I experienced recently, had been just givving a couple of patches of hoppes then a dry patch every 50 rounds or so but not doing a proper clean, at about the 150 round mark pressure jumped up markedly. A look with a borescope showed a "smeared" looking ring in the throat that required polishing out.
My first overbore cal that is suppressed and the combination of slow powder and suppressor means that now rather than trying to leave carbon in I will be trying to remove it reguarly.
I dont have a starting lands measurment to compare for you unfortunately as it came with developed loads but I do now so will see how it goes from here.

Try using some patches soaked in CLR ( from likes of Warehouse ) removes carbon real good just dont spill on blued surfaces (not sure on cerekote)
Ive not had any issues with it but never leave it in for more than 30 mins