copper fouling

[flyfish]

This may be a dumb question,but, why do some of my guns have more copper in the barrles after shooting the others? Assume the same number of rounds are fired in each gun.

I shot my .257 last week and there was a lot more copper than in my sons 270 that I shot last night. Both guns shot Nosler bullets.

 

[Scott Spencer]

There could possibly be more rough spots or imperfections in one barrel versus the other one. I used the Tubb's Final Finish to clean up my barrel and I don't have nearly as much copper fouling or trouble cleaning my barrel now.

 

[Antelope_Sniper]

In my experience, velocity can make a large difference. Usually a .308 around 2750 will foul alot less then say a 7 STW at 3400....
Also barrel quality makes a big difference. Hand Lapped barrels tend to foul less then factory barrels....

 

[Ol` Joe]

Like the others said all barrels foul. Some do it quickly some can stand a bit more ammo down them. The big problem with fouling is accuracy can go to pot if it gets too bad. I would not worry too much about it as long as it takes a reasonable amount of shots to effect things, just clean well when accuracy degrades.

 

[old #7]

In my experience, velocity can make a large difference. Usually a .308 around 2750 will foul alot less then say a 7 STW at 3400....
Also barrel quality makes a big difference. Hand Lapped barrels tend to foul less then factory barrels....

+1
And twist rates.