270 Win 140 gr bullet load ideas

Discussion in 'Reloading' started by montana_native, Jun 2, 2010.

  1. montana_native

    montana_native Well-Known Member

    Messages:
    565
    Joined:
    Oct 4, 2008
    I've been shooting 58 gr of H-4831sc and 140 Accubonds which is a max load in Nosler's book. Velocity is only 2840 out of a 22" barrel.

    Is there a better powder for this bullet out of a short barrel? Any good powders to try with 150 Bergers and a short barrel?

    Thanks.
     
  2. royinidaho

    royinidaho Writers Guild

    Messages:
    8,853
    Joined:
    Jan 20, 2004
    Let's do some calculations:

    How much velocity increase per inch of bbl beyond 22: Lets say 20 FPS, just guessing, but reasonable.

    27" bbl, 58.5 RL-22 = 3190 FPS MV with the 140 NAB.

    5" shorter barrel = 5 X 20 or 100 fps mv loss or 3090 FPS out of a 22" bbl.

    Switch to RL-22, learn to live with the temp. sensitivity and don't look back. Use Non Magnum primers also (CCI-200 are a good choice)

    PS: Whoever said 4831 is the powder for the 270 Win either passed away before more powders were available or should be locked up!

    60 grains of the stuff would break 2900 fps by much, if any, out of a 24" bbl.
     

  3. winmag

    winmag Well-Known Member

    Messages:
    2,528
    Joined:
    Dec 23, 2009
    RL-19 or RL-22.
    Have you tried H-4350? Roy is gonna hate me for this but I like IMR4831 in just about anything I shoot. (338wm down to 30-06) It seems to be the ''leatherman'', or a ''do all'' powder if you will, but it sure doesnt give the velocity of RL, and some others.
    I switched from IMR 4831 to RL-19 in my 270wsm and 140gr Accubonds and got alot more speed and a little more accuracy. Win/Win situation.
     
  4. royinidaho

    royinidaho Writers Guild

    Messages:
    8,853
    Joined:
    Jan 20, 2004
    montana native,

    I'll not hate what winmag said (he's always raggin' on me about somethin' :)) as he is correct. 4831 just doesn't get the velocity that other powders do.

    The disappointing thing is that back in the day when 60 gr 4831 was booked at 3012 with the 130 class bullet, I shot tons of mule deer, chucks and coyotes at all kinds of distances for many years.

    I then bought a chronograph and was really bummed that I was barely breaking 2900 MV. The rifle be came suddenly useless. Once I got'r stoked up to proper velocities I was a happy camper again.:rolleyes:

    Back then Norma 205 (which is RL-22 that is swept off of the floor where 205 is made:D thus the temperature sensitivity) was what brought the velocity back.
     
  5. montana_native

    montana_native Well-Known Member

    Messages:
    565
    Joined:
    Oct 4, 2008
    Thanks for the info. I wonder how RL-17 would work. I've got some RL-22 I will try. It would be nice to pick up another 150 fps or so. I guess I always thought the short barrel was what was killing velocity not the powder.

    Thanks again.
     
  6. bigngreen

    bigngreen Well-Known Member

    Messages:
    5,840
    Joined:
    Nov 24, 2008
    Not necessarily the first thing that comes to mind but try some R17 or Magpro if you have it, I've put them in some cartriges that aren't what you would think of it for and have it work great, specially with that stub barrel.
    Our 270 win's go to powder is 7828 but that may be way to slow for your short barrel.
     
  7. nonnieselman

    nonnieselman Well-Known Member

    Messages:
    63
    Joined:
    May 12, 2010
    Ive been having really good luck with 140gr Bergers with 59grs of H4831 with a BR primer and RP brass. 2971fps +/- 4fps 82*
    No pressure signs in the least, im working on a .2grain increase till i see pressure signs. Gotten up to 59.6 and the groups arent doin so great so im goin back to 59.

    R700 SPS 24" barrel
     
  8. 270 Sender0

    270 Sender0 Well-Known Member

    Messages:
    92
    Joined:
    Sep 11, 2007
    Since you guys last discussed this has anyone changed powders or bullets. I always liked to find out what's been cooking.
     
  9. moosekiller99

    moosekiller99 Active Member

    Messages:
    37
    Joined:
    Apr 7, 2012
    I have had great success with 140 AB and 57 grains of IMR 4831 in my M-77 Ruger.
    Chrono says an average of 3097 with 22" barrel. With 56.0 IMR 4831 and the 140 VLD hunting bullet, I average 3020 so far. 22 inch stock barrel The AB load is my son's favorite for his A-Bolt Stainless Stalker with CCI BR-2 primers, Win brass and 57.0 of IMR 4831.
    For 150 grain VLD's my current two finalists are 57.2 grains of RL-22 and 53.2 grains of IMR 4831. Win primers and Win brass, sorted for weight. The RL-22 pushes the 150 VLD nearly 100 fps faster with nearly identical sub .5 MOA groups at 100yds. No pressure issues noted thus far.
    Been loading for the .270 for 30 years and have tried more bullet/powder combinations than I care to remember. In all that time H4831 has never given me results that would make it #1 on my list of .270 "go to" powders.