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moly coating

Sir Martin
Hi, i have heard that moly coating is bad. what excactly is moly coating and what are the ups and downs of it?

Thanks you,
Martin Janczak
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Comments

10 comments

Date Votes
  • FrancF
    Moly is a bullet coating that acts as a lubricant that reduces friction, fouling etc; In short it's a can of worms. Some like it some don't. I have tried it and was not happy with the results. In my AR-15 H-Bar my groups @ 100 yards went from a nice ?" to an average of 1 1/4" inches. Then slowly got worse.

    Just my 2 cents, Like I said others have used it with success however I am not one of them.







    sniper.gif
    NRA Life Endowment Member
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  • Sir Martin
    i heard its almost imposible to clean..?
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  • Kdub
    If you haven't used it, don't get started with it - nastiest stuff you'll ever want to mess with![xx(]

    Has a tendency to get all over everything. Ended up using rubber gloves when handling the bullets for reloading. Took ages to get the crap off the press and other gun room fixtures. Still have a tumbler bowl that is ruined with it.

    It CAN be removed from a bore, but it takes patience, lots of scrubbing and lots of cleaning materials. For the small immediate gains, it isn't worth all the latter hard work to remove it. Another tendency is to build up unevenly in the bore causing streaks and lumps of deposit. Believe me, that will destroy accuracy faster than anything.

    I wouldn't recommend it! [:D]

    Keep off the Ridgeline
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  • Laredo Lefty
    I have a friend who loves it. I have never used it and dont plan to start after reading an article that pretty much said what the previous posters stated.

    Joe
    "Never let school interfere with your education"
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  • JustC
    Using moly coated pills without first "seasoning" the bore with a treatment of moly will lend the poor results stated above. From what I understand, the pre-treatment makes it much better in it's performance. I have not gone to moly because I just don't see a need. I have used moly bullets,..but cleaned after the range trip,..so it has never been allowed to build up in my bores. It is safer in stainless barrels than chromoly barrels. When the remnants of moly are exposed to humidity or rain etc,..the moisture in the air reacts with the moly chemistry to make a form of acid which will etch the barrel and in some extreme cases has pitted barrels. This was found to not occur in stainless bores.

    Also due to it's lubricity properties,..the powder charges must be increased to create the same pressures and speeds as the identical non-moly load. I fail to see how more plasma thrown at the throat will help to extend bore life,..so as I said,..I don't use it.

    why chase the game when the bullet can get em from here?....
    Got Balistics?
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  • cussedemgun
    moly, short for molybdenum disulfide

    molybdenum disulfide is a chemical compound of molybdenum (a metal) combined with sulfur and oxygen. in powder form, it has much the same appearance & lubricating properties as graphite.

    molybdenum disulfide is commonly used as a base in grease for high pressure applications such as open gears & chains. most truckers use the black messy stuff on their 5th wheel.

    moly being a combination of metal & sulfur, when it is exposed to heat in the presence of moisture, can break down to hydrogen sulfide (a corrosive acid) and metal fowling.

    as already stated, if you use moly coated bullets, do so with caution and clean often.




    "all I really need to know I learned in kindergarten" Robert Fulghum


    anyone who says "nobody needs a full auto" has never been in front of a brown bear charge
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  • MIKE WISKEY
    just my 2 cents worth. i've used moly coated bullets in several rifles and it works well. also some rifles that i don't use it in. in short it makes it easyer to keep copper fouling down and probably lengthens bore life, never had a corrosion problem. you cann't just subsitute moly bullets with the same load your rifle likes, you have to start over with load development. if you have a good barrel and shoot it a lot moly is worth the effort (probably not benchrest accuracy), but the rifles i use it in will group lest than an 1".
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  • gotstolefrom
    THIS MAY SEEM LIKE A REALLY OFF THE WALL MOLY USE, BUT THE TOPIC IS MOLY, SO HERE IT IS....MOLLY FOLLY

    I have an old 1911 that really needs a bushing/bbl tune up (and more), but I don't shoot it much now and was going to sell it....it has some sentamental value and has never let me down, so I kept it. I've had it forever, could shoot in the dark or without use of sights Here is what the rangemaster did for me, but said NEVER tell anyone HE DID IT.

    remove bbl and strip of oils,grease,prints,etc.
    Use masking tape to mask all but 3/4" of the end of the bbl.

    Spray a thin coat of Moly and let DRY. Do this 2X.

    Next mask only showing the last 1/2", spray thin coat Moly and let DRY. Do this 2X......Ah you are on to this insanity now.

    Now mask the last 1/4", spray thin coat Moly and let DRY, 2X

    Go back to the original 3/4" and give 1 or 2 thin coats.

    To my surprize, it was quite noticable, but only for 2 mags, and starts to open up after that. Hey, I told you it was off the wall, I could hardly believe it myself.
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  • Maj Dad
    Before you decide to do the moly thing, check out Varmint Al's reloading page - http://www.varmintal.com/arelo.htm - Moly Coating | Ms Moly | Midway Moly | Moly Corrosion - he has some sage advice about using it, and the drawbacks (not the least of which is serious corrosion in certain circumstances). I elected not to use it on my 6mm varmint pills, and have gotten 2" groups easily at 200 yds without, so give it some thought.
    Regards,
    Maj Dad

    "Klotzen, nicht kleckern."
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  • je2140
    Kinda makes me wonder, the instructions for my new Armalite AR10 recommend during barrel break-in (1st 100 rounds) to use moly coated bullets.

    JR
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