Very dirty 270 weatherby mag factory ammo.

[tribb]

A new rifle bore may not be smooth. It's not what we expect from a new rifle, but it happens. This could be why it fouls more than you expect. The high velocity contributes to fouling.

Do a break-in, clean it well after every session and apply bore paste as the second step before final clean. After a few repeats like this it should polish up enough that it cleans in four or five patches.

Please explain bore paste. Thanks Tribb

 

[jrock]

Seems like part of the breaking in process. I just broke in a 204 that had powder fouling worse than any gun I had shot before. However, after shooting a shot, then cleaning for 4 rounds, it started to go way down. Next 8 rounds was less fouling than the first by well over half. That is why I like to break guns in. I bet if you do it, you'll see that go way down.

 

[fiftybmg]

Please explain bore paste. Thanks Tribb

Bore paste is something like Iosso. It's a bore cleaner, that does a good job of removing anything in the barrel.

You only need a little bit at a time, gives a deeper clean than liquids can, and is good for removing the bits that stick to the rifling imperfections. Iosso cannot "wear" the rifling.

There are bore pastes that can smooth a very rough bore, as they have some fine abrasive in them, but in this case, just use something like Iosso for a few cleans, and see how it works out.

If you need to smooth the bore itself, there are products that can do it, and I'm sure you'll get a lot of good input if ask about it on this forum.

 

[tribb]

Seems like part of the breaking in process. I just broke in a 204 that had powder fouling worse than any gun I had shot before. However, after shooting a shot, then cleaning for 4 rounds, it started to go way down. Next 8 rounds was less fouling than the first by well over half. That is why I like to break guns in. I bet if you do it, you'll see that go way down.

Thanks

 

[tribb]

Seems like part of the breaking in process. I just broke in a 204 that had powder fouling worse than any gun I had shot before. However, after shooting a shot, then cleaning for 4 rounds, it started to go way down. Next 8 rounds was less fouling than the first by well over half. That is why I like to break guns in. I bet if you do it, you'll see that go way down.

Roger that

 

[066wally]

Same here with a new barrel, excessive carbon fouling for about ten rounds. Normal carbon fouling afterward. I've not had any copper fouling at all.

 

[jdyoung]

So you clean it every couple shots while breaking it in with factory ammo. I do that with every acquired rifle, new or used. What you end up with is burnished/polished lands and groves and a barrel that is less likely to copper foul. Then when you reload, you can of course pick a powder that burns cleaner. Maybe even add a factory crimp ( Lee Factory Crimp die) to keep the powder burn in the cartridge/chamber longer.