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PA_Bob Offline OP
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I received my first AR for Christmas, a Ruger AR-556. Haven't fired it yet, wondering if I should Dyna bore coat the barrel before christening it? I'm also new to the Dyna-Tek bore coat--have had the product for sometime, yet to use it.

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I am wondering how ya know its working ?

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Is the barrel chrome lined? If it is, I would not bother. There are no pores for the DBC to embed in.


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Originally Posted by PA_Bob
I received my first AR for Christmas, a Ruger AR-556. Haven't fired it yet, wondering if I should Dyna bore coat the barrel before christening it? I'm also new to the Dyna-Tek bore coat--have had the product for sometime, yet to use it.


1. Dyna-tek bore coat is no longer listed as a product on the web page www.dyna-tek.com. Which is on the package for product support.
2. The instructions on the package are incomplete and vague.
3. The company has not responded to 5 emails asking for help or if they even support the product anymore. Guess instead of being nice I should have pulled a little twig Peterson brass type complaint. At least they might respond.🤬
If you do have problems, Nobody but Nobody is going to help you.
My advice is to really think hard on it, I mean really hard. Myself, what I have left in the bottle is going to be executed by a 50 grain BK @ 4000 fps out of a Swift. That’s all it’s fugging good for.

Last edited by Swifty52; 12/29/18.


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PA_Bob Offline OP
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Originally Posted by Tyrone
Is the barrel chrome lined? If it is, I would not bother. There are no pores for the DBC to embed in.


Ruger website says nothing about chrome lining.

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PA_Bob Offline OP
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Originally Posted by misser
I am wondering how ya know its working ?


'Zactly!!...but the oft-maligned and occasionally missing "directions" for the bore coating include references to the bore being cleaned down to bare metal prior to installation/swabbing. Hence the opportunity prior to fouling it all up....less work for me in the long run.

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If the barrel is stainless or chrome-moly I'd treat it.
If chrome lined or melonited I wouldn't.
The gun was probably test fired so you still need to clean it throughly before treating.


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Have owned several rifles with chrome-lined bores, and have yet to find the chrome prevents fouling. It may slow it down, but doesn't prevent it.

I DBC'd the chrome-lined bore of a new Bushmaster AR-15 purchased in 2007 before ever firing the rifle myself. Haven't cleaned the bore exactly once since, after 200+ rounds. It not only doesn't show any trace of copper-fouling but shoots the same way it did when new, extremely well.


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PA_Bob Offline OP
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Originally Posted by NVhntr
If the barrel is stainless or chrome-moly I'd treat it.
If chrome lined or melonited I wouldn't.
The gun was probably test fired so you still need to clean it throughly before treating.


From the Ruger website: "Cold hammer-forged 4140 chrome-moly steel barrel with ultra-precise rifling provides exceptional accuracy, longevity and easy cleaning. The 1:8" twist rate stabilizes bullets...."

Appreciate your opinion. I think I'll clean it well, treat it with bore coat, and schedule some range time.

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PA_Bob Offline OP
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Originally Posted by Mule Deer
Have owned several rifles with chrome-lined bores, and have yet to find the chrome prevents fouling. It may slow it down, but doesn't prevent it.

I DBC'd the chrome-lined bore of a new Bushmaster AR-15 purchased in 2007 before ever firing the rifle myself. Haven't cleaned the bore exactly once since, after 200+ rounds. It not only doesn't show any trace of copper-fouling but shoots the same way it did when new, extremely well.


Great testimonial/case report. I will clean and treat. Thanks!

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Originally Posted by Mule Deer
Have owned several rifles with chrome-lined bores, and have yet to find the chrome prevents fouling. It may slow it down, but doesn't prevent it.

I DBC'd the chrome-lined bore of a new Bushmaster AR-15 purchased in 2007 before ever firing the rifle myself. Haven't cleaned the bore exactly once since, after 200+ rounds. It not only doesn't show any trace of copper-fouling but shoots the same way it did when new, extremely well.



I've got a couple of the old "original" Bushmasters that are chrome lined. I've yet to ever get any copper fouling to amount to anything out of either barrel. I wonder why all hunting barrels aren't chrome lined after seeing how "slick" the old bushmaster barrels are. I Dyna-Tek all my other new barrels after cleaning them before I ever shoot them.


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