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

Originally Posted by Old_School

Been a while since I used my enfield, but put about 20 rounds of Greek HXP through it.
Noticed rust in the barrel after pulling it out today.
Is this just from moisture or from the ammo? I was pretty sure this stuff is supposed to be non corrosive.
It appears it might just be at the last 50mm of the barrel from what I can see.
I put a cleaning patch through after shooting, with a light oil, but that's about it.
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Winchester M69A is correct - sorry inadequate cleaning - remember oils coat solvents penetrate - one can put an oil over corrosion and its still there - - old 303 ammo - very carefully with a small funnel pour boiling water down barrel -that gets rid of the salts - then use hoppes no 9 or other good nitro powder solvent -you could if you have fired a few rounds carefull use of a bronze brush - but dont over do it - you can love a barrel to death - leave overnight or even a few days - rag will come out green - thats metallic fouling coming out - when no more green tinge on rag then put thru a quality gun oil like Remington oil - check barrel after a week or two - the rag says it all red brown rust - grey likely dust - green still metallic fouling coming out- some barrels worse than others for metallic fouling - I had a Tikka .308 early one and no matter how much bloody hoppes still showed metallic fouling even after bronze brush and leaving for periods