Fire (heat) cracking.

[ptb]

Ran a scope thru my 6.5 creed and found more heat cracking (checking) than I would have thought with 500 rounds or so. How much is too much. Accuracy becoming inconsistent. Use Reloder 17. Thx, pete

 

[L.Sherm]

If that's right at the start of the throat, that's nothing. I've seen alot worse that shot just fine.

 

[dok7mm]

Looks like a well started carbon ring, to boot.

 

[swe123]

I think barrel makers are loving these new inexpensive bore scopes.

 

[ptb]

Would a " more expensive" bore scope given me a different look or opinion about that damage?????

Yes it's right at the lead edge of the throat. Thx for your input. Also found some pitting further down the barrel.

yea, also noticed the start of a carbon ring. Need to get after that too!

 

[swe123]

I was trying to say that there are a lot more people looking at their bores.

 

[DJ Fergus]

I own a bore scope & chronograph. They can be useful. I've also heard several people say that you've got to know when to not pay attention to either a borescope or chronograph. I've found out that there's alot of truth to that statement.

 

[ptb]

Here is more damage.

 

[swe123]

IMHO accuracy falloff is not due to the bore. if that's all there is.

 

[DJ Fergus]

Here is more damage.

I've saw pits like that on brand new unfired barrels. I'm not saying that it's not a problem I'm just saying it could have been there early on unless you bore scoped it new and saw it. The edge of the rifling with the chunk out is more worriesome. Have you been chasing your rifling with running your seating depth out? Or just kept seating depth the same after you found your load?

 

[ATH]

If you're losing accuracy at 500 rounds in a 6.5CM, barrel wear is unlikely to be your issue. You've got a carbon ring or some other issue unless you sat there and fired those rounds until the barrel was red hot...and then just kept going. I've got 1000+ rounds on both a 300WM and a 243 AI only starting to marginally increase groups. This is not an exception but rather typical.

 

[ptb]

I am sorry if I came off like an A hole. Kind of wishing I didn't buy one!!! Lol. Agree that too much info not always the best!

 

[swe123]

I bought two. One for me and one for my shooting buddy so it would drive him nuts too.

 

[Schnyd112]

It's one of those ignorance is bliss things. That is nothing, don't worry about it, and sell your bore scope to somebody you don't like so they can obsess about nothing.

The worst thing you can do is start questioning your rifle because you opened Pandora's box and can't go back. It's physics and it is in every rifle that has been fired. Don't look again until the rifle has 2000 rounds or you start crushing shoulders and blowing primers. It's like changing your oil every 500 miles because it isn't clear anymore.

The second worst is going after it and aggressively scrubbing the barrel or, more specifically, the throat. That will ruin it for sure.