Hello members, i have bought a second hand rifle,and found out that the barrel has been molyed my the owner.i have tryed to clean it out with nearly all clearners ,petrol was my last attempt .after cleaning the barrel,it looks great, until i put metho down the barrel to neutralize the clearners,i see like black slug or lumps in the barrel,again i put a rag through the the barrel and it has a jet black to silvery grey colour with a touch of bright flex on the rag i use non moly projectiles. not a moly fan .
JB bore paste on patch wrapped over a nylon brush will help to get it out. Focus on the throat area as it will build up there.
Apparently ammonia strips it off too so u could always try a high ammonia solvent.....Ive heard of people using regular household ammonia to help get it out. Once u have the majority of it out, shooting bare bullets will help too.
I'm gonna have to do it too in the next week so I feel your pain
"Brasso" ( ammonia based ) on a loose fitting rag will help remove most of it. Polish with a fine paste ( JB or similar ) . what's left will shoot out in 20 or so rounds.
Barry
Hello Simon, thank you for your quick reply,i will try the ammonia on the weekend, it looks like it could be too windy for the 1000 yard shoot on sunday in bundy,it will give me something to do.
G'Day all,
moly has a natural affinity to steel, so it becomes bonded/plated to the steel surface. Abrasion will probably remove it but you risk removing metal or damaging the barrels internal dimensions.
Moly cannot build up on itself; ball bearings used to apply the moly do not grow in size after many years of use.
The only thing you will find that builds upon itself is carbon fouling.
So I'd just make sure it is thoroughly clean and then just shoot the rifle and know the moly will eventually become thinner through erosion and abrasion from firing and cleaning.
So is the rifle a good shooter? if so , just shoot it!
If the barrel is stainless steel, I believe ammonia & ammonia based solvents should be avoided. Bore Tech Eliminator works well on moly, do not use with a bronze brush. Follow the Bore tech with about 15 strokes of J.B. paste. Make sure the J.B. is completely removed before firing. Abrasive cleaners will not harm the barrel if used correctly & removed properly. A badly moly & carbon fouled barrel may not clean up without using an abrasive cleaner. These are my thoughts & are not a criticism of other cleaning methods. But I do see a lot of barrels that are not cleaned properly.
Keith H.
After borescoping several hundred SS barrels in the last 7 years, I have found what I see as evidence that Ammonia may hasten throat erosion. Certainly not scientific evidence, more gut feeling, but enough to convince me not to let ammonia near any of my barrels. As I said, this is my opinion only, there will be many I am sure who will disagree with me, but I am not going to risk it when there are ways to clean without that risk.
Keith H.
hello to KHGS ,CHOPPER AND SIMON C. I dont know what brand of moly the person was using in the riFLe i bought sorry chopper,i try to find out . are you telling me that good old sweets ( which i thought is ammonia base) is damaging my s/s barrels on my rifles KHGS ?
i have not tryed to clean the rifle barrel with ammonia yet.i am getting worried now and dont know what to do or just leave it and shoot the barrel until it burnt out. from barry t
Barry, my first post tells you how I would deal with your problem, I do not understand the confusion. The brand of moly, or more importantly, the grade, will not matter, your main problem is not moly but carbon. Actually it is a form of calcium carbonate which when baked in is impervious to solvents & must be removed with an abrasive.
Keith H.
members, i have bought a second hand rifle,and found out that the barrel has been molyed my the owner.i have tryed to clean it out with nearly all clearners ,petrol was my last attempt 
.after cleaning the barrel,it looks great, until i put metho down the barrel to neutralize the clearners,i see like black slug or lumps in the barrel,again i put a rag through the the barrel and it has a jet black to silvery grey colour with a touch of bright flex on the rag 
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