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Thread: Varget vs Reloader 15 in 308 ??

  1. #16
    Join Date
    Feb 2003
    Location
    Deer Park, Texas
    Posts
    86
    They are talking about the burn rate of the powder at say 90 degrees vs. 35 degrees. Work up a load at 90 degrees and how does it shoot come hunting season at 35 degrees. Some powders there is a huge difference.

  2. #17
    Join Date
    Jan 2008
    Location
    Houston Texas
    Posts
    116

    Thanks!

    I appreciate the info!

  3. #18
    Join Date
    Apr 2004
    Location
    Issaquah,Wa
    Posts
    25

    Temperature changes

    Picture an all day long range match stating out at 0800 in the am with overcast sky and some what cool temps.4 to 6 hours later with the the Sun at full bore in a cloudless sky and an overall temerature increase of over 20 degrees Your vertical will be affected.Not a seasonall thing but a n hourly thing.Will

  4. #19
    Join Date
    Nov 2003
    Posts
    25
    Quote Originally Posted by Will Durant View Post
    Picture an all day long range match stating out at 0800 in the am with overcast sky and some what cool temps.4 to 6 hours later with the the Sun at full bore in a cloudless sky and an overall temerature increase of over 20 degrees Your vertical will be affected.Not a seasonall thing but a n hourly thing.Will
    This is especially true at Rattlesnake range near the Tri-Cities in southcentral Washington.
    Will, haven't seen you for a while. Are you still shooting prone matches?

  5. #20
    Join Date
    Oct 2003
    Location
    Walden NY
    Posts
    39
    To all that talk about temperature sensitivity. ALL POWDER is temperature sensitive. ALL POWDER!!!! Temperature is part of the function of burning. The hotter original temperature of anything that will burn will make it burn faster. That even goes for so called EXTREME POWDERS!!!! If you shoot H4831sc and re22 which are similar speed powders from their respective makers at 40 degrees and then shoot the same exact load of each at 95 degrees you will find that they both have a difference of 100fps between the two temperatures. There is NO powder that is NOT temperature sensitive.

  6. #21
    Join Date
    Jul 2004
    Location
    Aztec NM
    Posts
    143
    Hodgdon Extreme powders mfg by ADI use and ethyl centralite coating instead of DNT or dinitrotolulene used by IMR and others. The burn rate of the powders using DNT to coat nitrolcellulose is given by the extruded kernel or grains size. With centralite, burn rate is also a function of the coating allowing smaller kernels for better metering. The centralite coating is more temp stable given a change in weather conditions. Even so the powders do have variances due to temps:

    eg
    Hodgdon
    H4895 is tempurature pressure inverse as temp increases pressure decreases.
    Good multi-use powder best in Desert Southern NM TX AZ etc.

    Varget is supposed to be stable in all temps but I never could get groups worth a __ with it and its dirty and has more felt recoil than alternatives.

    RL 15 Is mfg by Bofors of Sweden For Alliant powder co owned by ATK industries. US military armory uses it to reload ammunition.
    my reasoning is 70 deg is maximum pressure with this powder. Colder such as Alaska or Hotter such as Saudi Arabia or Iraq pressure decreases. It meters
    well and in my loads more accurate than Varget.

  7. #22
    Join Date
    Jul 2005
    Posts
    30
    Quote Originally Posted by Talon1959 View Post
    Pardon my ignorance here but what exactly to y'all mean by temp sensitive? I am thinking room/storage temp. Then I thought about ambient temp outside at the range where it can get to be 95-100 degrees down here in Houston. Thanks in advance and don't laugh too hard.
    First off, no one will laugh.

    Temperature sensitive means that the higher ammbient temperature wherever you're shooting could cause the pressures to increase.

    If you loaded some ammo and the temp was 80 degrees on range day and the load was great (no pressure signs - sticky bolt, primers pushing out etc), then you go out the next time, with the same load, but the temp is 95 degrees, you get pressure signs.

    They are saying Varget is less supseptable the these extremes.

    My .308 Rem 700 doen't like Varget, but my PGWDTI Coyote (.308) like Varget.

  8. #23
    Join Date
    Mar 2006
    Location
    Louisiana
    Posts
    430
    I switched to H4895 from RL-15 and Varget. With the 175 SMK's 43.3 of Varget shot OK but 42.5 H4895 shot much better, velocity for the .308 and H4895 was 2,620fps. Ladders were run on both powders. I also switched from F210M's to CCI BR2's in the .308. I've found RL-15 to be very temp. Sensitive in my .308's and 6BR's. Varget and H4895 were less sensitive, Varget being best in my 6BR with CCI450's and H4895 being best in my .308's with CCIBR2's.

    Good luck,

    William

  9. #24
    Join Date
    Feb 2003
    Location
    Michaux State Forest, Adams County, Pennsylvania
    Posts
    26
    I've found that in one of my 6BR's and also in my .308 in temperatures below about 65 degress N540 will out shoot Varget everytime. However past 70 degrees and then Varget becomes the better choice in those two rifles.
    I just basicly stick with Varget to keep things simple.

    Danny

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