Copper Fouling in Pistol Barrels

Gun, shooting and equipment discussions unrelated to CHL issues

Moderator: carlson1


Topic author
Crash
Senior Member
Posts: 281
Joined: Mon Oct 08, 2007 11:13 pm

Copper Fouling in Pistol Barrels

Postby Crash » Sat Nov 18, 2017 2:01 pm

Almost every time I shoot my Howa bolt-action (.308 Winchester) more than just a few shots I have to clean some copper fouling out of the barrel. However, yesterday I fired about 100 rounds from my Glock 43, all of them copper-jacketed and when I cleaned the gun afterwards there was no copper fouling in the barrel. Some powder fouling, yes, but no copper fouling. Is there some velocity threshold below which copper fouling doesn't occur?

Thanks in advance,

Crash


WTR
Senior Member
Posts: 1167
Joined: Mon Nov 16, 2015 10:41 pm

Re: Copper Fouling in Pistol Barrels

Postby WTR » Sat Nov 18, 2017 2:07 pm

Hijack......my .308 is actually more accurate if I leave some copper layed down in the barrel.


Topic author
Crash
Senior Member
Posts: 281
Joined: Mon Oct 08, 2007 11:13 pm

Re: Copper Fouling in Pistol Barrels

Postby Crash » Sat Nov 18, 2017 2:12 pm

WTR wrote:Hijack......my .308 is actually more accurate if I leave some copper layed down in the barrel.


WTR,

Yes, I've heard that before. But, what about my question?

Crash


Nuts
Member
Posts: 132
Joined: Wed Nov 18, 2015 7:47 pm

Re: Copper Fouling in Pistol Barrels

Postby Nuts » Sat Nov 18, 2017 4:45 pm

It depends more on how polished your bore is.


mrvmax
Senior Member
Posts: 1421
Joined: Tue Oct 25, 2005 7:16 pm
Location: Friendswood
Contact:

Re: Copper Fouling in Pistol Barrels

Postby mrvmax » Sat Nov 18, 2017 10:15 pm

I have some rifles that foul worse than others. I’ve use Bore Coat in some and it works great and others it didn’t help. I usually put it on every new rifle anyway to help reduce fouling.
https://www.brownells.com/gun-cleaning- ... 41538.aspx

User avatar

bmwrdr
Senior Member
Posts: 1058
Joined: Tue Sep 03, 2013 4:05 pm

Re: Copper Fouling in Pistol Barrels

Postby bmwrdr » Sat Nov 18, 2017 10:25 pm

I'd assume the Glock doesn't show fowling in the barrel because it is polygonal and not grooved rifling.
I scarified political correctness to preserve honesty ︻╦̵̵͇̿̿̿̿══╤─


Topic author
Crash
Senior Member
Posts: 281
Joined: Mon Oct 08, 2007 11:13 pm

Re: Copper Fouling in Pistol Barrels

Postby Crash » Sun Nov 19, 2017 9:06 am

bmwrdr wrote:I'd assume the Glock doesn't show fowling in the barrel because it is polygonal and not grooved rifling.


Maybe that's it. Appreciate your input. However, I'm still wondering about that velocity threshold for depositing copper fouling????

Crash

User avatar

Bitter Clinger
Senior Member
Posts: 1676
Joined: Mon Jul 28, 2014 5:16 pm
Location: North Dallas

Re: Copper Fouling in Pistol Barrels

Postby Bitter Clinger » Sun Nov 19, 2017 9:23 am

Not clear that velocity is the root cause:

It has been my experience in shooting a number of rifles and barrels used in 1000- yard rifles, that longer barrels and faster twists tend to foul more. And as Fred pointed out, this could be caused more by the long bullets (and the internal forces acting on them) than the barrel. I found too that some bullets just seem to foul more than others. This is no doubt caused by differences in the gilding metal used to make the jackets


http://riflebarrels.com/barrel-fouling/

https://www.shootingsoftware.com/fouling.htm
"You may all go to Chicago, and I will go to Texas." - Davy Crockett
"Fast is fine, but accuracy is everything." - Wyatt Earp
NRA Life Member
לעולם לא תשכח

User avatar

bmwrdr
Senior Member
Posts: 1058
Joined: Tue Sep 03, 2013 4:05 pm

Re: Copper Fouling in Pistol Barrels

Postby bmwrdr » Sun Nov 19, 2017 9:38 am

Crash wrote:
bmwrdr wrote:I'd assume the Glock doesn't show fowling in the barrel because it is polygonal and not grooved rifling.


Maybe that's it. Appreciate your input. However, I'm still wondering about that velocity threshold for depositing copper fouling????

Crash


Dynamics in a rifle are different and with higher velocity comes higher temperature which in turn will leave a different kind and amount of residues in the barrel. I think some research on the web would be helpful to shed some light on this topic.
I scarified political correctness to preserve honesty ︻╦̵̵͇̿̿̿̿══╤─


Return to “General Gun, Shooting & Equipment Discussion”

Who is online

Users browsing this forum: Bing [Bot], flowrie, STR8-SHOT and 4 guests