I noticed four years ago that my Barrel shoots tighter groups after about 10 15 rounds have been pushed through it after cleaning. It's a custom AR 10 that was built for me. The barrel is a custom made 20" 1 in 11 twist. I would love to hear why. I use this gun for hunting and when I clean it I put 3 rounds through it because I feel more comfortable about calling my shot with a dirty barrel on this build. Tks.
-
Having trouble using the site?
Contact support
Can someone explain why my dirty barrel shoots better?
- Thread starter calico22
- Start date
Oh food for thought why I do put rounds through it before I take it out is because the shots we take are about 300 to 750yds so It does make a it a bit of a problem after 500yds with a clean barrel.
You're explaining pretty much every rifle ever created.
There is a reason you track your clean cold bore as well as your fouled cold bore and where they hit in relation to the next shots in your string.
The reason this is happening is (and you'll get 20 different explanations of this) the round going down the barrel with all of the fouling along with it are filling the microscopic gaps in the metal inside the bore. It's uniforming the bore more as well as creating a more consistent bearing surface inside the barrel.
Think of it this way, you clean all the shit out of your barrel. Now you shoot it once. The second shot will now experience a slightly different condition in the barrel because of the first shot. Continuing this has diminishing returns as you go and for your barrel that seems to be at around 10-15 rounds and will stay in that range until it changes too much; maybe at 400-500 rounds. This is why people usually laugh at those that shoot 10 rounds and then clean their barrel each time.
I'm sure there's a much better and scientific answer for you, but that's the gist of it.
There is a reason you track your clean cold bore as well as your fouled cold bore and where they hit in relation to the next shots in your string.
The reason this is happening is (and you'll get 20 different explanations of this) the round going down the barrel with all of the fouling along with it are filling the microscopic gaps in the metal inside the bore. It's uniforming the bore more as well as creating a more consistent bearing surface inside the barrel.
Think of it this way, you clean all the shit out of your barrel. Now you shoot it once. The second shot will now experience a slightly different condition in the barrel because of the first shot. Continuing this has diminishing returns as you go and for your barrel that seems to be at around 10-15 rounds and will stay in that range until it changes too much; maybe at 400-500 rounds. This is why people usually laugh at those that shoot 10 rounds and then clean their barrel each time.
I'm sure there's a much better and scientific answer for you, but that's the gist of it.
Watch the video at 4:25...maybe that will clarify some things.
https://www.youtube.com/watch?v=rW6SF-jlbkg
https://www.youtube.com/watch?v=rW6SF-jlbkg
You'll get lots of opinions about this one. If it is not copper fouling and is accurate why clean the bore? After the barrel stops copper fouling and the carbon layer is building up as long as they are accurate I keep shooting. The next shot should be just as accurate as the last. If you notice the accuracy is falling off then clean it and fire fouling shots after.
IMO the carbon layer protects the bullet from the bare metal of the bore. The carbon fills the small scratches and corners of the lands making a better seal.
Barnes bullets show better accuracy when the barrel has been cleaned and only fired with Barnes bullets. It seems they don't like being shot after bullets with a different alloy copper.
Barrels are different, some shoot better one way others are opposite.
Similar threads
- Poll
