28 Nosler , h1000 and 180 Burger hybrids

[Tommy T]

Carbon Ring with Zero pressure signs, just barrel break in and low round count?
Have you seen this? I have never had a problem with Carbon rings in the past 45 years so knowledge is only second hand.

Yes I have had it in a couple of new rifles around 200 rounds it's pretty common if you you shoot a lot ,lot of my friends and gun smiths have had the same problem I learned the hard way about it

 

[FullCurl8]

A few pics of the chamber. I don't see a carbon ring here, unless I'm missing something. Thoughts? I will scrub the bore and see what post pic looks like. Fire cracking seems worse than I'd hoped even for this cartridge after 142 rounds. Will pause more than I have been while at range sessions, although I have not been shooting more that 5 in a string before cooling. Pic 1 is with a new unfired case in chamber. Pic 2 is with a 2x fired case. Pic 3 is with mirror removed looking straight down bore. The lack of pressure signs is a bit confusing.

 

[Tommy T]

A few pics of the chamber. I don't see a carbon ring here, unless I'm missing something. Thoughts? I will scrub the bore and see what post pic looks like. Fire cracking seems worse than I'd hoped even for this cartridge after 142 rounds. Will pause more than I have been while at range sessions, although I have not been shooting more that 5 in a string before cooling. Pic 1 is with a new unfired case in chamber. Pic 2 is with a 2x fired case. Pic 3 is with mirror removed looking straight down bore. The lack of pressure signs is a bit confusing.

252

 

[Tommy T]

A few pics of the chamber. I don't see a carbon ring here, unless I'm missing something. Thoughts? I will scrub the bore and see what post pic looks like. Fire cracking seems worse than I'd hoped even for this cartridge after 142 rounds. Will pause more than I have been while at range sessions, although I have not been shooting more that 5 in a string before cooling. Pic 1 is with a new unfired case in chamber. Pic 2 is with a 2x fired case. Pic 3 is with mirror removed looking straight down bore. The lack of pressure signs is a bit confusing.

A few pics of the chamber. I don't see a carbon ring here, unless I'm missing something. Thoughts? I will scrub the bore and see what post pic looks like. Fire cracking seems worse than I'd hoped even for this cartridge after 142 rounds. Will pause more than I have been while at range sessions, although I have not been shooting more that 5 in a string before cooling. Pic 1 is with a new unfired case in chamber. Pic 2 is with a 2x fired case. Pic 3 is with mirror removed looking straight down bore. The lack of pressure signs is a bit confusing.

2752 picture looks like carbon ring in it

 

[FullCurl8]

252

uhmmm. Not sure what 252 means.

 

[FullCurl8]

uhmmm. Not sure what 252 means.

ok gotchya. scrubbing with hoppes and its definitely much dirtier that i originally thought. this barrel seems to foul easily.

 

[Tommy T]

2752 picture looks like carbon ring in it

Take you a bore mop and soak it with Seafoam over night

 

[FullCurl8]

Take you a bore mop and soak it with Seafoam over night

Take you a bore mop and soak it with Seafoam over night

Well had some success ridding it. Chased down a few other rabbit holes and going down the Seafoam one! I use it on a lot of things, so why not a bore. I'm still reluctant to believe that a modest carbon ring that did not result in pressure signs is responsible for groups opening and poi shift. Pulled action and verified all my bedding is good, no deviation on a dial indicator as action screws are loosened. But have to try something. Next will be trying another scope. Thanks for helping a guy out Tommy.

 

[Tommy T]

Well had some success ridding it. Chased down a few other rabbit holes and going down the Seafoam one! I use it on a lot of things, so why not a bore. I'm still reluctant to believe that a modest carbon ring that did not result in pressure signs is responsible for groups opening and poi shift. Pulled action and verified all my bedding is good, no deviation on a dial indicator as action screws are loosened. But have to try something. Next will be trying another scope. Thanks for helping a guy out Tommy.

You welcome I no what you are saying I was the same way ,I had a 6k custom build rifle and just one day it just went all to S//T BUT AFTER A LOT OF RESEARCH THE SEAFOAM DONE THE TRICK GOOD LUCK HOPE IT WORKS OUT FOR YOU take a nylon brush and turn it round and round after the foam soakes in and use some JB gray compound

 

[FullCurl8]

You welcome I no what you are saying I was the same way ,I had a 6k custom build rifle and just one day it just went all to S//T BUT AFTER A LOT OF RESEARCH THE SEAFOAM DONE THE TRICK GOOD LUCK HOPE IT WORKS OUT FOR YOU take a nylon brush and turn it round and round after the foam soakes in and use some JB gray compound

JB grey… I have the oatmeal brown stuff and pink bore shine. Have lots of Brownells lapping compound 600 and 800. This isn't going to be a range gun, but it's a good setup. Once it's shooting minute of elk at 800 it won't see much range time. Just wanted something lighter. I'm hoping the barrel Choice wasn't a mistake, and I read good reviews on much heavier hitting 338 Lapuas on Carbon6 as well. Will let ya know how it shoot's tomorrow. Thanks again.

 

[Tommy T]

JB grey… I have the oatmeal brown stuff and pink bore shine. Have lots of Brownells lapping compound 600 and 800. This isn't going to be a range gun, but it's a good setup. Once it's shooting minute of elk at 800 it won't see much range time. Just wanted something lighter. I'm hoping the barrel Choice wasn't a mistake, and I read good reviews on much heavier hitting 338 Lapuas on Carbon6 as well. Will let ya know how it shoot's tomorrow. Thanks again.

Use the JB ON LAPING THE BARREL THOSE CARBON 6 BARRELS ARE BUTON CUT BUILD MY MCGOWAN

 

[FullCurl8]

The Seafoam didn't work on the carbon. Will try more JB bore paste then shooting today.

 

[FullCurl8]

The Seafoam didn't work on the carbon. Will try more JB bore paste then shooting today.

Might be that the ring is gone, from stroking this barrel 150 times though. These pics are with a spent case in place. Will also not be trimming brass for a bit to fill that void hopefully

 

[Tommy T]

Might be that the ring is gone, from stroking this barrel 150 times though. These pics are with a spent case in place. Will also not be trimming brass for a bit to fill that void hopefully

Did you soak it over night