Thread: Suppressors and pressure

clr but dont leave it in the barrel too long

My moneys on a carbon ring, happened to my prc at around 70 rounds too.
gunslick foaming cleaner and a stiff brush worked on mine.

Carbon rings can be total bastards to get out when they get to a glazed/ceramic point. First thing you really need is a borescope to see what's -actually- there. No amount of "looking down it" will give useful detail. If there is a serious carbon ring, basic solvent measures will be useless as that stuff is TOUGH. If it's a stainless barrel, CLR as mentioned with attack it but needs to be in combination with mechanical action, ie a worn bronze brush short-stroked back and forth mainly in the first 200mm of the barrel, then left to soak and repeat in say 30mins. In bad cases, this can take say five cycles of this. Make sure it's well flushed out afterwards.

For less severe cases, an undersize bronze brush lightly wrapped with patch, minimal amount of Kroil added then slathered with Autosol and short-stroked will shift it. Won't work with a full-blown glazed carbon ring.

I can't emphasise enough the need for a borescope. They aren't expensive- check out Teslong.

Thankfully a simple remedy and cause and my suspicion was right.
Wiped the cases on a cloth thoroughly before firing today both with and without suppressor. No pressure signs at all and easy bolt lift. Made no other changes (didn't even clean it - other than a boresnake through to ensure no residual oil in bore).

I now realise I used Lee reloading lube (white paste type stuff) when working up the load which was easy to wipe off. I have since switched to RCBS lube on a pad. It's a lot oilier than the Lee lube and obviously takes more than a wipe with paper towels after loading to remove the lubricity.

I'll starting wet tumbling for a short time with some dish washing liquid after FL sizing now to ensure all lube is completely off.

Originally Posted by veitnamcam

My moneys on a carbon ring, happened to my prc at around 70 rounds too.
gunslick foaming cleaner and a stiff brush worked on mine.

Mine also was the same. I use clr and then Wipeout . No more issues.
I use meths on a .410 mop to clean the chamber before firing to make sure no oil/lube in there. Also meths on a rag after brass sizing to clean off case lube as I don't tumble my brass.