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Thread: 129g SST's

  1. #1

    129g SST's

    I have recently been given a couple of boxes 129g SST's and was wondering if any load data out there for them through the 6.5x55. I have N160 N150 and N140 powders at hand.

    Cheers

    Bryan


    Alba gu brąth

    Sauer 101 6.5x55, Beretta Silver Pigeon 12g Over&Under
    .

  2. #2
    Lyman book gives data for 129gr Hornady SP for 6.5x55sm
    N160 start 41.5 Max 46

  3. #3
    Lee manual has the following:

    N160: 43.0 - 47.3gr (2757fps)

    3.15" COAL

  4. #4
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    Hornady's 7th edition reloading manual for 129 gr SST in 6.5 x 55 for N160: 33.4 grains min load, 43.6 grains max load (2,700 fps). COAL 2.905"
    This bullet works very well in my .260 Rem at similar velocities.
    Last edited by Brian243; 02-03-2016 at 08:47.

  5. #5
    Cheers lads,

    Ive loaded up a few to 45.5g to see how I go but would tend to lean towards the Lee manual I think, Hornady 9th edition shows same loads with a 29" 1 in 7 1/2 twist test barrel @ 43.6g max.


    Alba gu brąth

    Sauer 101 6.5x55, Beretta Silver Pigeon 12g Over&Under
    .

  6. #6
    Quote Originally Posted by Brian243 View Post
    Hornady's 7th edition reloading manual for 129 gr SST in 6.5 x 55 for N160: 33.4 grains min load, 43.6 grains max load (2,700 fps). COAL 2.905"
    This bullet works very well in my .260 Rem at similar velocities.
    This seems horrendously low...

  7. #7
    I reload for a friend's 6.5x55 in a Steyr ProMountain the recipe is 45.6 gr of N160 with the bullet seated 200 thou back from the lands using Fed Gold primers and this shoots regularly at .6"

  8. #8
    How long is your barrel? Most N160 data is for long barrels. If you shoot 20-22" then use N150. Better burn (usually nearly 100%) means better consistency.

    BE

  9. #9
    Quote Originally Posted by big ears View Post
    How long is your barrel? Most N160 data is for long barrels. If you shoot 20-22" then use N150. Better burn (usually nearly 100%) means better consistency.

    BE

    22" barrel BE, I do have N150 in the loading cupboard, do you have any load data for that powder?

    Cheers

    Bryan


    Alba gu brąth

    Sauer 101 6.5x55, Beretta Silver Pigeon 12g Over&Under
    .

  10. #10
    Hi Bryan,

    i used 43gr N150 coal 3.150. This is 0.3 under max load but showed no pressure signs. MV was about 2700fps

    BW

    BE

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