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Hey hBN tumbled today and have BIG Q-?

softcock

softcock

novice judgmental prick
Full Member
Minuteman
    • Mar 24, 2006
    2,593
    3,202
    Oregon
    #1
    I tumbled in sealed container with some BB's and a small amount of the White hBN for 3-hours in low RPM drum. Tumbled some 190 grn. vld's tonight just to checkout to see how that hBN looks. & it is weird looking stuff ?. not like I am comfortable with seeing from moly tumbled .
    1st time hBN & new coating fir me. I have done Moly tumble in the past though and this is Not like the 'Clean & Even' coating of black moly coating on the bullets like I am used to seeing but it leaves a White frosting powder on the bullets & it's kind of cakey and inconstant in coverage that is frosted heavy ???

    OK, Am I to leave that heavy powder cake on them & fire . Or wipe it off ????
    This crap is White and does not show well on surface. If I wipe it off, the cakey powder ? is there enough impregnated in the bullet surface to benefit from for Lube ?

    ....tahnks
    .
     
    #5
    Re: Hey hBN tumbled today and have BIG Q-?

    thanks, the stuff is just different looking forsure. I will just wipe-off the excess white frost .

    Man this shit grown legs and walks on it's own also. LOL .
    I know a nm particle is 1-k of a micron but you don't really realize ' just how small it is ' until you try to contain such small particles. The stuff just walks up & out the small threads of the lid & container that it was tumbling in. I definitely need to get tuned-up better on the hBN tumbling.
    .
     
    #6
    Re: Hey hBN tumbled today and have BIG Q-?

    Powdered donut look is just a by product of the coating process, I use a Steaming pan set up from Walmart to separate the BB and bullets, then I put the bullets in an old wool sock that had no partner, for final polish, shake the excess off and your GTG.
     
    #7
    Re: Hey hBN tumbled today and have BIG Q-?


    I have wiped it off when using in a barrel already cleaned and have been shooting Hbn coated bullets.

    And have left most of the cakeing on with a barrel cleaned down to the metal and is the first time using Hbn coated bullets. Did so trying to copy David Tubb's "barrel polishing" technique.

    After shooting 100 lr 22 with most of the caking on in a old barrel the groups are now about 1/2 size using uncoated ammo. Don't know if would be the same results using bullets with the caking wiped off.
     
    #8
    Re: Hey hBN tumbled today and have BIG Q-?

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: softcock</div><div class="ubbcode-body">
    I know a nm particle is 1-k of a micron but you don't really realize ' just how small it is ' until you try to contain such small particles. The stuff just walks up & out the small threads of the lid & container that it was tumbling in. I definitely need to get tuned-up better on the hBN tumbling.
    . </div></div>

    I have a thumler Model T Tumbler I use for nothing other than hBN coating. It is water tight but the 70nm hBN leaks out of the seal.
     
    #10
    Re: Hey hBN tumbled today and have BIG Q-?

    A response to a novice on another board.

    -----------------------------------------------

    Here's where we are, Edge. 5 round group minimums.
    1/2"moa. We went through both RE15 and 4064 in 1/2gr increments. We suspected that Wilson shooting at sea level with us at 4,000 feet was going to make a difference in his load data, and we were right. 4064 is moa for sure, but the RE15 produced tigher groups. We checked LC against Win brass, but truth be told we think this shiney LC is machine gun brass. We'll be buying some brand new LC next week. Unfotunate that I have around 2,000 LC supposedly once-fired, but now I'm suspicious.

    Lat forgot his camera so we'll save that for the 300 and 500 yard shots. Onhce we're truly happy we'll go down the valley for 1,000 yard shooting.
    The process ended up being 100 new Sierra MK 175s in the 5" peanut butter jar filled to the 1/3 mark with steel impact coated BBs. Add 2.5gr of hBN and tumble in a Thumler's Tumbler for 3 hours. I know all about all of the posts about amount and dwell time, but after some 350 projectiles coated at varilous amounts, dwell time and sent down range, this is our current opinion. That's not to say we won't mess around with both factors this fall, but at 1/2"moa with a .308 sem-auto I'm not going to complain.

    One more session this afternoon, and I'll keep you posted.

    zfk55


    BTW..... my son is the one at Swiss Rifles running the tests.
     
    #12
    Re: Hey hBN tumbled today and have BIG Q-?

    Probably got a little too much in there. Really doesn't take much powder! I use an old towel to clean them up. Dump the bullets in the middle, fold it up lengthwise and hold the ends. Alternately raise and lower right and left slowly and let the bullets tumble from end to end about ten times then open the towel out and put the purty things in a box. JMHO
     
    #13
    #15
    Re: Hey hBN tumbled today and have BIG Q-?

    one more thing about the hBN. I noticed the stuff really fills and packs in the tiny HP hole in the nose of the Berger's after tumbling.
    .
     
    #16
    Re: Hey hBN tumbled today and have BIG Q-?

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: zfk55</div><div class="ubbcode-body">Now that is weird. I hadn't heard the towel thing before, but check this out. And you're right. I was led astray by the unknowing infidels and used too much.
    Scroll down near the bottom of page one. The poster is my son on his forum.

    http://theswissriflesdotcommessageboard.yuku.com/topic/6761/t/The-zfk55-and-the-Wilson.html

    Coincidence, eh?

    zfk55 </div></div>

    Leave us Infidels out of it!!!
     
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