Cooling barrel question?

[smokefromtheeast]

makes it alot easier then trial and error thank you guys

[deanmc]

If I cant hold my hand on it I cool it down. Actually I dont usually let mine even get that hot but I have heard a lot of people say that.

[fish gunner]

Originally Posted by smokefromtheeast

what is the best method for guagein heat

You can actually get a heat paint pen that changes color to show temp range. Or the new ir temp guns iirc 30-50$. I have applied paint to a short lenth of banding and touch to the breech to give a ball park tenp range.

[twofifty]

Originally Posted by sns2

Time to end hostilities.

We all agree that shooting barrels till they are too hot too touch and pouring water on them just ain't smart.

The one thing I like about these threads is learning new words i.e. obturation.

Agreed.
This thread also made me think of a few words that also apply to this thread:

obtuse
and
obdurate.

p.s. I'm putting my money on Dick.

[wally338]

"Cold air in a can" is a real time saver

[Rman]

Originally Posted by catnthehat

So how many rounds before this one showed signs of wear?
Cat

Cat, the barrel was pulled after the fire forming was done. Just over 1000 rounds.

R.

[Robmcleod82]

Too hot to touch is in most cases not that hot, try grabbing hold of something that is 80 degrees c feels really hot. Unless you are using a ray tech you are ****ing in the wind. I have seen said barrel that is in question of Rmans and he is not bull****ing. And as far as actually shooting, I have personally seen the man shoot out to a mile. I have also seen him wear out a 338 lapua barrel. So in closing he is not full of chit, his head may be slightly large but that is an altogether different issue.

[nekred]

There are so many factors when it comes to metallurgy and the book is not closed yet.

There si an iron pillar in India that does not rust, Not stainless Steel but IRON,

Apparantly there are some barrells that also break the laws of physics, chemiistry!....obstinately....

One fact is that M60 barrells were made with stellite tohelp ensure accuracy even when they became WHITE Hot, they were cooled in water and then re-fired and point of impact remained the same. Howver it became dangerous because rounds were starting to pre-ignite just from being chambered....

Some barrells need to be babied and others... not so much... In fact we can also get into a debate... some guns shoot better slightly dirty than clean, others like to be clean as a whistle... etc.

Metallurgy is a very interesting game and especially in rifle barrells where they are subjected to extremes....

Ok here is a question.... if you were outside shooting at -30 is more extreme than placing a rifle in an air conditioned cab to enhance the cooling...

Temperature shock in steel can lead to fracturing depending on its metallurgical properties and these are not all equal....

There are all sorts of theories and "cryogenic" barrells is part of a theory as well...

I have played with this:

What is more damaging the last 10 rounds in a hot barrell or using air in a can upside down to let the cryogenic liquid go into the barrel and then shoot those 10 rounds?

[sns2]

Boys, this thread has degenerated into a science class in which there is probably no qualified professor with a Phd. in Metallurgy.

To the OP: You are on the right track. Here is summary of the really useful info that no one will fight about. Shoot a 3-5 shot group and let the rifle cool between groups. If it's warm outside feel free to use the air conditioner in your vehicle to speed the cooling time.

Yaa, it's over

[twofifty]

No big revelation here, but I found that removing the box mag and propping the rifle up with an open bolt speeds up natural cooling, esp. if there is the slightest breeze.

Sitting on the bags bolt open takes longer.