The 23rd "I just bought a Teslong and you won't believe what I saw" thread

[Just Say Moe]

I bought a Teslong borescope to confirm some of my barrels are toasted and to confirm I am lousy at cleaning.
1. My main prairie dog rifle, a Remington XR-100, that has several thousand rounds (sometimes through a hot barrel) through was it severely fire cracked and eroded. No surprise as a 62 grain bullet will no longer touch the lands. Anyway, it still shoots MOA so it still is #1. My oldest 700 223 backup rifle that has not been shot hot also has some cracking..... kind of a surprise.

2. By Beloved 1952 Remington 721 300 H&H was pretty badly fire cracked too. Kind of a little surprise, but burning 70 grains of powder each shot takes a toll I suppose The biggest surprise was the amount of copper - ugh. It is soaking right now.

3. After looking at the well shot 223's, I looked in 2 1999 vintage 700's that have less than 50 rounds through each. In addition to the tooling marks, the beginning of the rifling was not uniform. There is a half moon where about 3 of the lands don't reach the neck of the chamber. What is up with this? Both rifles shoot sub MOA.

 

[Dusty Stevens]

In the picture is just mass production.
As far as the firecracking when hot- that additional couple hundred degrees matters none as hot as burning powder is. Ive seen em firecracked that shot once at a time, rarely 2 shots within a day and they are still cracked. Old wives tale about shooting them hot- if its going to crack at 1000rds itll do it whether thats in one day or 35yrs

 

[Downhill]

Here is a R700 308 Varmint I traded for. UGLY.

 

[Ccrider]

Here is a R700 308 Varmint I traded for. UGLY.View attachment 1197617 View attachment 1197617

Scary stuff right dare.

 

[Just Say Moe]

In the picture is just mass production.
As far as the firecracking when hot- that additional couple hundred degrees matters none as hot as burning powder is. Ive seen em firecracked that shot once at a time, rarely 2 shots within a day and they are still cracked. Old wives tale about shooting them hot- if its going to crack at 1000rds itll do it whether thats in one day or 35yrs

That is good to know - sometimes it is hard to hold back when you are down to 1 rifle and there are dogs barkin'.....

 

[tominboise]

Here is a R700 308 Varmint I traded for. UGLY.View attachment 1197617 View attachment 1197617

Ouch. Hard to believe. How does the rifle shoot?

 

[MikeMcCasland]

Here is a R700 308 Varmint I traded for. UGLY.View attachment 1197617 View attachment 1197617

Normally I don't put much stock into what a borescope shows as far as 'barrel condition', but I'd have that rifle at the smith with a new blank yesterday.

 

[Lefty Trigger]

Here is a R700 308 Varmint I traded for. UGLY.View attachment 1197617 View attachment 1197617

WTH I thought some of my stuff was bad, what happened to it?

 

[Lefty Trigger]

I bought a Teslong borescope to confirm some of my barrels are toasted and to confirm I am lousy at cleaning.
1. My main prairie dog rifle, a Remington XR-100, that has several thousand rounds (sometimes through a hot barrel) through was it severely fire cracked and eroded. No surprise as a 62 grain bullet will no longer touch the lands. Anyway, it still shoots MOA so it still is #1. My oldest 700 223 backup rifle that has not been shot hot also has some cracking..... kind of a surprise.

2. By Beloved 1952 Remington 721 300 H&H was pretty badly fire cracked too. Kind of a little surprise, but burning 70 grains of powder each shot takes a toll I suppose The biggest surprise was the amount of copper - ugh. It is soaking right now.

3. After looking at the well shot 223's, I looked in 2 1999 vintage 700's that have less than 50 rounds through each. In addition to the tooling marks, the beginning of the rifling was not uniform. There is a half moon where about 3 of the lands don't reach the neck of the chamber. What is up with this? Both rifles shoot sub MOA.View attachment 1197610

Looks like the chamber was not cut square to the bore axis.

 

[SSL]

Here is a R700 308 Varmint I traded for. UGLY.View attachment 1197617 View attachment 1197617

Thanks. Now I'll have nightmares for weeks!

 

[338 Mollett]

I saw a Rem barrel one time where there was no angle on one side of the lands and the thing still put 3 in a half inch at a 100.

 

[carlsbad]

Here is a R700 308 Varmint I traded for. UGLY.View attachment 1197617 View attachment 1197617

Not a problem. they put out a special Damascus Steel edition in 1959. --Jerry

 

[PigButtons]

These are pics from a very old 22 K Hornet barrel. This is a MOA or better rifle but it is way old, so old that it requires .223 bullet dia. not .224 like modern Hornets. I was especially shocked to see the cross hatched scratches about a third of the way up the bore. Just goes to prove that the target results are way more important than the bore scope pics.

 

[tmwinds]

I'm convinced that bore scope manufacturers are being subsidized by aftermarket barrel manufacturers.

 

[Ned Ludd]

Not to worry folks, look on the bright side. All of your barrel borescope images will look much, much better in the near future because there are no primers or powder available to reload.

 

[Spotshooter]

Just say Moe,

there aren’t enough pictures from all the way around the throat to tell 100% - but in general

When you see the lands NOT stopping at the same point it means the chamber, and the bore just past the neck (throat area) are NOT aligned... Or you had some really screwy chatter that started a LONG way back and wasn’t corrected (5R’s get that a lot)

I’ve seen many factory barrels like that with some lands (throat area) reaching back to nearly the neck, and on the opposite side of the barrel they stop much further down the bore.

If you use the Gritters chambering method (and do it well) which aligns to the bore as it leaves the neck, you get a really nice symmetric set of land cuts that all stop in the same place. I’ve heard One or two guys say they don’t see benefit to using that method, but my guess is they aren’t getting the nice concentric / symmetrical results that you get when doing it correctly...

** disclaimer - it could also be someone running a necker / throater up that was also not aligned.. but we’ll assume the simplest case.

 

[1shot]

I use a bore scope for only two reasons.
1. As a visual confirmation to what it looks like when the barrel stops shooting well.
2. To assess my ability to clean the barrel.
I hope this helps,

Lloyd

 

[hoz53]

Here is a R700 308 Varmint I traded for. UGLY.View attachment 1197617 View attachment 1197617

i think i would contact Remington on that one, inless it shoots really good

 

[hoz53]

I bought a Teslong borescope to confirm some of my barrels are toasted and to confirm I am lousy at cleaning.
1. My main prairie dog rifle, a Remington XR-100, that has several thousand rounds (sometimes through a hot barrel) through was it severely fire cracked and eroded. No surprise as a 62 grain bullet will no longer touch the lands. Anyway, it still shoots MOA so it still is #1. My oldest 700 223 backup rifle that has not been shot hot also has some cracking..... kind of a surprise.

2. By Beloved 1952 Remington 721 300 H&H was pretty badly fire cracked too. Kind of a little surprise, but burning 70 grains of powder each shot takes a toll I suppose The biggest surprise was the amount of copper - ugh. It is soaking right now.

3. After looking at the well shot 223's, I looked in 2 1999 vintage 700's that have less than 50 rounds through each. In addition to the tooling marks, the beginning of the rifling was not uniform. There is a half moon where about 3 of the lands don't reach the neck of the chamber. What is up with this? Both rifles shoot sub MOA.View attachment 1197610

i used one today(borescope) to align the gasblock on an AR-15

 

[46and2]

I bought a Teslong borescope to confirm some of my barrels are toasted and to confirm I am lousy at cleaning.
1. My main prairie dog rifle, a Remington XR-100, that has several thousand rounds (sometimes through a hot barrel) through was it severely fire cracked and eroded. No surprise as a 62 grain bullet will no longer touch the lands. Anyway, it still shoots MOA so it still is #1. My oldest 700 223 backup rifle that has not been shot hot also has some cracking..... kind of a surprise.

2. By Beloved 1952 Remington 721 300 H&H was pretty badly fire cracked too. Kind of a little surprise, but burning 70 grains of powder each shot takes a toll I suppose The biggest surprise was the amount of copper - ugh. It is soaking right now.

3. After looking at the well shot 223's, I looked in 2 1999 vintage 700's that have less than 50 rounds through each. In addition to the tooling marks, the beginning of the rifling was not uniform. There is a half moon where about 3 of the lands don't reach the neck of the chamber. What is up with this? Both rifles shoot sub MOA.View attachment 1197610

To me, this looks like carbon!!
Clean/scrub this area with carbon remover and take another picture please. I'm curious.