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!

yes this thread has gone around in circles a bit - if you have not fired a corrosive primed round then you do not need to use boiling water -modern ammunition is non corrosive - Nitro powder solvents come in a number of types - some are very strong and a must is stick to instructions especially the ammonia based products - I dont use them just to violent and difficult to use - Hoppes no 9 is kind - a petroleum based product and can be left in - you are using it to get rid of mettalic fouling from the bullet jacket i.e copper nickel - and to remove powder fouling so use Hoppes to give your initial clean and if you have fired a lot of rounds then use with a bronze brush - dry rags and after that use a good oil to store firearm -the thin CRC type products use when you suspect water may have got in - or when camping out - or when you first arrive home put some thru barrel until you can give barrel a proper clean - keep those away from woodwork- scopes- they can suck themselves into very tiny spaces - I believe that's called capillary action - your cleaning regime was just not robust enough and I suspect parts of the barrel missed out -