close
Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Photography > Gun Photos

Reply

6mm Competition Match by MCR

LinkBack Thread Tools Display Modes
  #8  
Unread 07-23-2012, 02:22 PM
SPONSOR
 
Join Date: Mar 2004
Location: Danville, PA
Posts: 1,112
Re: 6mm Competition Match by MCR

As of right now I'm only aware of 3 smiths that have the 6mm CM reamer. Chad Dixon, Dave Bruno and me ( Montour County Rifles ). I got permission from Joe Hendricks to have PTG make the reamer. PTG claimed it is proprietary, after I e-mailed Joe for permission he gave it his blessing and the reamer was made. I've built a couple of these already and have 3 more orders for rifles chambered in 6mm CM. I shoot long range varmint benchrest silhouette and woodchuck hunt so this will be my new cartridge.
__________________
Home of the "EXTENDED IMPACT" DVD

www.mcrifles.com
Reply With Quote
  •   #9  
    Unread 07-23-2012, 02:42 PM
    Platinum Member
     
    Join Date: Feb 2010
    Location: Gillette, WY
    Posts: 2,994
    Re: 6mm Competition Match by MCR

    I know Chad has been very enthusiastic about the 6mm Competition Match, get him talking about 6mm & grab your popcorn!

    I can only imagine what a melonited barrel & BN coated bullets would yield!
    __________________
    "I, however, view ethics as an individual decision. My ethics are mine - and I won't explain or justify them to anyone else. I seek nobody's approval, just that of my own conscience. "

    Reply With Quote

      #10  
    Unread 07-23-2012, 02:57 PM
    Platinum Member
     
    Join Date: Apr 2008
    Location: Central ND
    Posts: 1,018
    Re: 6mm Competition Match by MCR

    Thanks Kevin I will do some digging before I call, I have a couple big bench rest matches coming up. Sounds like the perfect caliber for dispatching medium size game and smaller.

    Yeah those 6mm's are fun to shoot, cheap to shoot, and accurate like 1.5" group at 550yds accurate. Kind of saddens me to put my bench rifle away. Thats why I want another 6mm hunting rifle.


    Brent
    __________________
    "Amazing things can happen when preparation meet opportunity" Richard Schatz


    "The will to win, compares little with the will to prepare to win" Donovan Moran
    Reply With Quote
      #11  
    Unread 07-25-2012, 07:54 AM
    Platinum Member
     
    Join Date: May 2012
    Location: columbus,ohio
    Posts: 1,463
    Re: 6mm Competition Match by MCR

    there are some that are claiming this new cartridge will be a barrel burner due to exactly why you are stating that barrels should last longer instead of shorter.is the chart that shows barrel life with different burn rate powders just old information or is it just therory instead of facts? to me it makes sense that using slower burning powders results in cooler temps and should prolong firecracking ,resulting in longer bore life.
    Reply With Quote
      #12  
    Unread 07-25-2012, 08:10 AM
    SPONSOR
     
    Join Date: Mar 2004
    Location: Danville, PA
    Posts: 1,112
    Re: 6mm Competition Match by MCR

    The 6mm CM is not necessarily a new cartridge. I've found information on it from Joe Hendricks as far back as 2005 and I know he's been experimenting with other variations long before that . I'm not exactly sure what year he first chambered one in 6mm CM, but from 2005 to now it has finally gotten to the point where the rifles that were chambered in it have had the time to get 3500 - 4000 rounds through them and prove the longer barrel life.

    Here's some quoted info from Joe Hendrick taken from the pdf attachment earlier in this thread.

    What our research and experience has shown is that barrel life is directly related
    to how much you push the cartridge. There is much we do not understand about
    barrel life, but our experience has proven that what we are doing works and works
    very well.
    When you shoot a cartridge with less capacity you have to shoot faster burning
    powder to obtain equal velocities to a cartridge of the same bullet diameter with a
    larger capacity, or you are giving up velocity while still pushing the cartridge as
    hard as you can. (6BR, 6mm-22-250, 6XC).
    Shooting the faster burning powder does three things to your barrel.
    1) First; the faster burning powder burns at a hotter temperature. Steel, what
    all barrels are made from, is more malleable at higher temperatures. What
    this means is that the hotter the temperature inside the barrel the more
    metal that can be removed by the softer copper bullet. This is especially
    important in rapid fire strings and during practice where there isn’t as
    much time between shots or strings. The difference in temperature from
    the faster burning powders to the slower burning powders is minimal,
    however over 2000 to 3000 rounds it does make a difference.
    2) Second with the faster burning powder, the pressure behind the bullet goes
    up very fast and goes down very fast. The maximum pressure of the shot
    takes place very quickly in or around the throat area of the barrel. This
    puts the maximum force on the most important part of the barrel. Anyone
    who has ever bent a paper clip or wire back and forth understands that if
    you do it enough the material weakens and eventually breaks. Faster
    burning powder is doing this your barrel and overtime it weakens. This is
    obviously a factor in barrel life.
    3) Third faster burning powder burns faster and burns more in the throat of
    your barrel. What this means is that the area where the bullet contacts the
    lands of the barrel takes all of the abuse. Not just from the bullet, but from
    the powder also.
    What has been concluded from this is that faster burning powder stress the barrel
    more than slower burning powder, by the force of the pressure, by the heat that
    weakens the steel, and then by the burning of the powder.

    The reasons for longer barrel life:
    1) First the slower burning powder burns at a cooler temperature than faster
    burning powders. These lower temperatures have a great affect on
    extending barrel life. The barrel is not subject to as hot of a temperature
    and therefore the bullets do not have as much of an affect on the steel as
    with faster burning powders. The barrel’s steel is less malleable because
    of lower temperatures. You are not subjecting your barrel to the same
    temperatures you do with faster burning powder. Keep in mind that the
    temperature difference is minimal to you and I but to the barrel it is
    making a huge difference.
    2) Second the pressure curve is much different with a slower burning
    powder. With a slower burning powder the pressure peak is down the
    barrel much farther. The pressure curve is much smoother and even
    though the peak pressure is about the same it stresses more of the length of
    the barrel. What this means is that you are subjecting your barrel to a
    lower average stress over the length of the barrel on every shot and the
    stress is spread over a larger portion of the barrel’s length. Again, think of
    the paperclip, if you only bend it a little and bend it in different places it
    takes much longer to break it. The lower pressure and the pressure applied
    over a greater amount of the barrel adds to the life of the barrel.
    3) Third, it burns slower. Therefore the powder is burning as it goes down
    the barrel. However, we want as much of the powder to burn in the case
    as possible and that is part of the design of the 6CM. The slower burning
    powder gives a more even affect to the barrel. The burning powder is less
    concentrated in one part of the barrel and barrel ware is more uniform.
    __________________
    Home of the "EXTENDED IMPACT" DVD

    www.mcrifles.com
    Reply With Quote
      #13  
    Unread 07-25-2012, 08:31 AM
    Platinum Member
     
    Join Date: May 2012
    Location: columbus,ohio
    Posts: 1,463
    Re: 6mm Competition Match by MCR

    yes this all sounds accurate to me,but most of the information on the internet and forums claim just the opposite.i've always been a .243 win fan myself,but have been reading that the .243 has a shorter barrel life than most others.i myself have not found this to be true.especially since i've started shooting heavier bullets and slower powders from mine.
    Reply With Quote
      #14  
    Unread 07-25-2012, 10:06 PM
    Platinum Member
     
    Join Date: Dec 2006
    Location: New Mexico
    Posts: 1,656
    Re: 6mm Competition Match by MCR

    How does it compare to the 6XC. Would it be a better more accurate round? How would it work in a tactical match?
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: 6mm Competition Match by MCR
    Thread Thread Starter Forum Replies Last Post
    WTS: .224 Diameter 52gr HPBT Nosler Custom Competition (Match) Bullets rangemaster01 Reloading Equipment and Components 8 03-12-2013 12:34 AM
    WTS: 22 Caliber .224 Diameter 52gr HPBT Nosler Custom Competition (Match) Bullets rangemaster01 Reloading Equipment and Components 0 07-10-2012 07:32 PM
    Redding Match or Competition Capstick Reloading 4 03-30-2012 09:06 PM
    WOW!!!! First 1000 yd competition match 83blazer General Discussion 1 06-02-2010 09:24 AM
    Colt match target competition MTBULLET Guns For Sale 1 10-31-2009 11:33 AM


    All times are GMT -5. The time now is 10:19 AM.


    Powered by vBulletin ©2000 - 2017, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC