Top Ad

Collapse

Announcement

Collapse
No announcement yet.

Do You Use An Abrasive ?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Do You Use An Abrasive ?

    A article in TFB talks about throat erosion. Author says a chrome molly barrel surface roughens like sandpaper with the effects of the powder flame (stainless surface cracks) The use of a abrasive would work to smooth the steel again and slow the progression of erosion. Anybody use an abrasive to smooth their chamber ? There are compounds available and coated bullets that you load and shoot through the barrel. I routinely use JB non-embedding bore paste on all my barrels. Stainless uses a different JB paste. Seems to keep them shooting straight. I wonder if all powders burn at similar temperatures ? Some have said the shape of the powder kernel affects throat erosion.
    Double base powders do burn hotter, not sure about duration. Any comments ?
    Last edited by jhjimbo; 09-21-2019, 11:59 AM.

  • #2
    I shoot a lot of overbore cartridges like the 22-6mm, 6mm Creedmoor, 25-06, .300 Dakota, etc. These tend to leave a ceramic-like carbon deposit in the front of the throat and in the first few inches of the bore. Regular carbon and copper solvents do not remove this hard carbon build up. Through a bore scope, it looks like dark grey alligator hide and you are sure your barrel is cooked. I scrub this area with a metal cleaner called Semichrome and the barrel/throat look like new again. That is until they are really completely eroded after lots of shooting.

    Symptoms that tell me I need to remove this carbon buildup are:

    1. High pressure signs on a normally good load. The thick carbon build up in the throat begins to squeeze the neck brass into the bullet causing extremely high pressure (blown primers, ejector marks on the brass, etc.)

    2. Inaccuracy. The rifle used to shoot bug holes and now it's shooting three inch groups. Long range precision is especially impaired with bullet deformation.

    3. Visual appearance of crackled throat/bore within a few inches of the chamber.

    Comment


    • #3
      And here I thought I was abrasive enough

      Comment


      • #4
        Yeah, I do use an Abrasive.

        Comment

        Welcome!

        Collapse

        Welcome to Field and Streams's Answers section. Here you will find hunting, fishing, and survival tips from the editors of Field and Stream, as well as recommendations from readers like yourself.

        If this is your first visit, be sure to check out the FAQ for information on posting and navigating the forums.

        And don't forget to check out the latest reviews on guns and outdoor gear on fieldandstream.com.

        Right Rail 1

        Collapse

        Top Active Users

        Collapse

        There are no top active users.

        Right Rail 2

        Collapse

        Latest Topics

        Collapse

        • Reply to Season ends
          by WA Mtnhunter
          I’m 70, battling cancer, trying to stay in shape, and still working my dogs. Not going to quit until I can’t get on my feet. I’ve had a good run,...
          Today, 10:39 PM
        • Season ends
          by Ontario Honker Hunter
          On my way home ... finally. Headed to West Side (Montana) for Thanksgiving with my brothers but a very nasty blizzard delayed me till Saturday. After...
          Today, 12:41 AM
        • Reply to Virginia Gun Confiscation !
          by Sarge01
          If Virginia had followed through with their anti gun legislation you would have seen the start of the 2nd civil war in the US.
          Today, 10:26 PM
        • Virginia Gun Confiscation !
          by bowhunter75richard
          Virginia legislature has dropped it’s AR-15 confiscation ruling. They have now stated those who presently own these weapons can continue to do so,...
          Today, 05:33 PM
        • Reply to Pet Peeves
          by fitch270
          My boy does the "I mean" thing quite often, usually when he's trying to think of how to explain something. I have no idea where he got it from,...
          Today, 10:21 PM

        Right Rail 3

        Collapse

        Footer Ad

        Collapse
        Working...
        X