Thread: HXP 303 ammo corrosive? found rust in my barrel

Originally Posted by Old_School

Ok, so I went into my store to grab some breakfree, they had heard about it but didn't stock it.
He said he only puts a bore solvent such as hoppes through the gun every 100 rounds or so. He just puts a few patches of a good penetrating oil down the barrel after a shoot.
He told me CRC brakleen is a good solvent to put down to clean all the crap down the barrel too.
Also was told you are supposed to put a dry patch down the barrel before shooting to get rid of any oil, can damage the barrel. He said a 303 is more forgiving, but if it had caused a bulge, you would feel it.
He sold me a can of Kroil to use, said this is a good penetrating oil that coats the barrel but it not too thick.


I will do the boiling water trick tonight, then spray with brakleen and then go over with a good scrub of hoppes followed by patches soaked in the stuff and finally the oil.
Quite a process!

Used Brakleen for years. Buy several cans at once when on special. Use it for other cleaning tasks, not just gun cleaning.
It will remove carbon and a bit of Cu when using it for the initial part of the clean. I mainly use it to neutralise any solvents I use. Despite what the manufacturers say (eg Boretech) I don't leave their stuff in my barrels too long. I also use the Brakleen to blast my brushes clean or flush them under the hot tap first followed up by Brakleen.

Hoppe's is basically useless for quich Cu removal and their benchrest blend is even more so..

Serious Shooters was the only place I could find Breakfree when I went looking about 6 months ago. Had to contact them and they bottled a smaller amount. Didn't want the 1 gallon they list on their website.

I always use a bore guide and put 2 layers of those cheap microfibre cloths over the butt and up to under the bore guide. Learnt my lesson of solvent attacking wooden stock finish years ago.