How To Detect Burnt Barrel?

[jwest]

Hello Calgunners,

I was out at Metcalf on Black Friday shooting my first 7mm (Rem Mag) reloads out of my Remington 770 7mm.

Question that I have - these rifles are not designed to be fired too frequently in succession - how do you know when you have burnt a barrel out?

This isn't my first outing with the rifle - but I have only had it for about 1 1/2 yrs - and I have noticed that the barrel gets warm after only firing 3 rounds.

Thanks in advance for your expert response(s).

Best Regards,
jwest
PS - In case you were wondering - I was very pleased with my reloads - even though my targets got very wet...

[G17GUY]

Whats the throat area look like.

Is it keyholing?

[uxo2]

firing fullauto which is unlikely...

Over loaded ammo...

Shooting beyond the round life of the barrel


Using corrosive ammo and not cleaning....




But you will never hopefully encounter such.

Enjoy it for what it is...It will most likely outlast you.

Just get use to the fact that when it gets warm....
Your groups will open and barrel heats up.


And if you ruin the barrel from using it.
A gunsmith should be able to re-barrle it

What kind of shooting are you doing anyways..
Bench rest...forever going for group size?
Huntin gun??
Plinker??
???

[mofugly13]

Barrels dont "burn out". What happens is ththe throat, the area just in front of the chamber, erodes after time. Small bores plus hot powders will erode a thoat faster than big bores with slower powders. The throat on a 7mm will typically erode enough to affect accuracy after about 600-700 rounds.

The warming of thae barrel after three rounds is not unusual, after all, you are pushing a tight fitting chunk of metal down a metal tube using very hot gasses. One thing about developing a load is waiting for the barrel to cool between shot strings. Sometimes it seems to take forever.

[Fjold]

When it feels too hot to rest the back of your hand on the action end of the barrel comfortably then stop shooting and let the barrel cool down.

[ar15barrels]

how do you know when you have burnt a barrel out?

Accuracy degrades.

[bohoki]

Accuracy degrades.

yea it gets really sad when handloaders finally work up a good load and find out the barrel has turned for the worst

[ar15barrels]

yea it gets really sad when handloaders finally work up a good load and find out the barrel has turned for the worst

I just started shooting a 243.
I currently have 146 rounds through the barrel.
I was just thinking to myself, wow, the barrel is already 10% used up and I have only had it to the range 3 times!

I'm going to shoot about 120 rounds this weekend.
There goes another 7%

[jwest]

Accuracy degrades.

Also when it heats up - definitely noticed that. But, after I let it cool - all is well again...

[jwest]

Whats the throat area look like.

Is it keyholing?

I am sorry it took me a little while to get back to everyone.

I did a proper and thorough cleaning of my 7mm last weekend - I didn't take any pics - but the throat area looks fine. I did not see any pitting or other damage.

[jwest]

firing fullauto which is unlikely...
Over loaded ammo...
Shooting beyond the round life of the barrel
Using corrosive ammo and not cleaning....
But you will never hopefully encounter such.
Enjoy it for what it is...It will most likely outlast you.
Just get use to the fact that when it gets warm....
Your groups will open and barrel heats up.
And if you ruin the barrel from using it.
A gunsmith should be able to re-barrle it
=
What kind of shooting are you doing anyways..
Bench rest...forever going for group size?
Huntin gun??
Plinker??
???

ux02 - sorry for not getting back to this sooner:

7mm fullauto? I like to think I have strong shoulders - but, ah, nope, no way. 7mm bolt action. I don't know of any civi 7mm (Rem Mag) semi-auto's - but Ha! I think you meant this as a joke - or maybe you thought 7mm-08 - should've made it clear - 7mm Rem Mag - but thought Rem 7mm 770 'said' that...

(OK - I stand corrected: http://www.browning.com/products/cat...31&type_id=329 - didn't know Browning made these...)

Over-loaded ammo - nope - have just shot factory and 1 batch of reloads thus far - was very careful with the reloads - I used my 550 as if it was a single station loader. (Which begs another question - how many of you reload some of the bigger stuff with a 550? Kindof hard to get the bullets in - isn't it?)

Shooting beyond the round life of the barrel - don't think so - but need to understand more of what that really means.

Using corrosive ammo and not cleaning....
Nope - I have a 7.62x54R - and know what that means - but I haven't shot any corrosive ammo with this rifle (7mm) - I have with the 54R - but I clean immediately. Even have had range guys yell at me for doing so.

Just get use to the fact that when it gets warm....
Your groups will open and barrel heats up. - Yes, have definitely noticed that. Once I let it cool though - all is well.

And if you ruin the barrel from using it.
A gunsmith should be able to re-barrel it - That is good to know.

What kind of shooting are you doing anyways..
Bench rest...forever going for group size?
Huntin gun??
Plinker??

Huntin' and plinkin' mostly.

Thanks,
jwest

[jwest]

When it feels too hot to rest the back of your hand on the action end of the barrel comfortably then stop shooting and let the barrel cool down.

Yes, good advice.

[jwest]

Barrels dont "burn out". What happens is ththe throat, the area just in front of the chamber, erodes after time. Small bores plus hot powders will erode a thoat faster than big bores with slower powders. The throat on a 7mm will typically erode enough to affect accuracy after about 600-700 rounds.

The warming of thae barrel after three rounds is not unusual, after all, you are pushing a tight fitting chunk of metal down a metal tube using very hot gasses. One thing about developing a load is waiting for the barrel to cool between shot strings. Sometimes it seems to take forever.

Yes, it does seem like forever. But, this rifle was made for hunting, and you will only get off one, at the most two rounds in most cases before the game is out of range.

[jwest]

I just started shooting a 243.
I currently have 146 rounds through the barrel.
I was just thinking to myself, wow, the barrel is already 10% used up and I have only had it to the range 3 times!

I'm going to shoot about 120 rounds this weekend.
There goes another 7%

Is this your laser?