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Thread: 6.5x55 load with N160 & 129gr SST

  1. #1

    6.5x55 load with N160 & 129gr SST

    Hi,

    I've scoured the internet for a load using the above ingredients and 46gr looks to be favourable.
    I know I have work up to that in steady increments but where would someone start regarding bullet seating depth?

    Rifle is a Sako 75, the barrel length is 20"

    Thanks

    Regards
    TN

  2. #2
    20 thou off the lands
    Official Sponsor to Team GB F Class

  3. #3

  4. #4
    Just done this 45.8 worked the best with coal 3.055. You will find it very difficult to go 20 thou off lands as your chamber is large and there will not be enough bullet in the brass. I would start at 45.5 and go up to 47 in steps. Keep the coal at about 3.050.

    See previous threads there is some great advice.
    worked for me!

    ATB

    BE

  5. #5
    I would seat them further back to start off with. I would argue that,

    - you will still get results that will enable you to fine tune your load (There is also a good chance it won't make any difference).

    - If you haven't measured your bullet length correctly or your seating isn't accurate and you end up with bullets on the lands then your results will be inconsistent or inaccurate anyway (perhaps even dangerous).

    I'm using 140gr ssts in my 6.5 and although I have measured them right up to the lands previously (and with other calibers I own) I have seated these so that the widest part of the boat tail is level with the bottom of the neck of the case.

    I hasn't made any difference in collecting the data I needed to see at what powder measure the average velocity spread was tightening and obtaining best accuracy.

  6. #6
    Thanks fella's, I appreciate the replies and advice.

  7. #7
    Quote Originally Posted by Tackleberry270 View Post
    I would seat them further back to start off with. I would argue that,

    - you will still get results that will enable you to fine tune your load (There is also a good chance it won't make any difference).
    I 100% agree with this. How can anyone just arbitrarily suggest a distance from the lands with any degree of certainty? I seat with the parallel sides of the bullet at the junction of the neck and shoulder, then adjust outward to either the magazine length or the rifling as necessary. I have never had to do much of this. Most loads work really well seated deep.~Muir

  8. #8
    Thanks Muir, I was after a starting point, I was thinking, or hoping, that there would be a 'known' place to start.

    Regards
    TN

  9. #9
    +1 to this.

    End of the parallel of bullet level with junction of case neck and shoulder.

    I think this gives the most consistent (and maximum) "grip" on the bullet, hence the greatest consistency.

    It also my assertion that consistency leads to precision and hence accuracy.


    Quote Originally Posted by Muir View Post
    I 100% agree with this. How can anyone just arbitrarily suggest a distance from the lands with any degree of certainty? I seat with the parallel sides of the bullet at the junction of the neck and shoulder, then adjust outward to either the magazine length or the rifling as necessary. I have never had to do much of this. Most loads work really well seated deep.~Muir
    "Nonsense! They couldn't hit an elephant at this dista.....................".

  10. #10

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