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

Originally Posted by Barry the hunter

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 -

Yes I agree, going by what No.3 suggests, there may be a chance of remaining corrosive primer salts from the previous owner that we don't know about.
So probably no harm in using boiling water.
Going forward, main thing appears to use some sort of powder solvent, then apply oil, so I will research what products are best to address removing powder residue for a start, if no9 does the job, I guess I will stick with that.
Regarding the copper solvent dissolving brushes, ive never experienced this using hoppes no9. Is this stuff truly a copper solvent? Would also suggest this stuff contains some kind of acid if it can dissolve copper.
The guy in the shop also said that the eezeox stuffs probably not the best oil to protect the barrel.