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Thread: Sub MOA.... What next?

  1. #1

    Sub MOA.... What next?

    Hi Reloaders,

    I have been working up a load for my recently re barrelled 6.5x47L.

    I went for a Lothar Walther #1400 - Heavy Weight Sporter barrel, 20 Inch in length with 1 in 8 twist.
    I’m shooting Hornady SST 129grain heads.
    RL 15
    Federal Match primers

    I have got on well with it and it's shooting sub MOA at 200yards and just about cloverleafs every time at 100yards…. If I do my bit! I have taken a number of deer with it and very happy with the performance.

    It is my understanding however that this inherently accurate calibre is capable of even more with a little uber fine tuning!

    My question is what is my next step?


    Thanks in advance,
    Miles

  2. #2
    Hi try the cci-450 primers this cal seems to love them & is the recommended primer in this cal. I use them with 123g A-Max or 120g nosler & get 1/4" moa at 100yrd with H4350 but can no longer get this powder now.

  3. #3
    Quote Originally Posted by 2428 miles View Post
    Hi Reloaders,

    I have been working up a load for my recently re barrelled 6.5x47L.

    I went for a Lothar Walther #1400 - Heavy Weight Sporter barrel, 20 Inch in length with 1 in 8 twist.
    I’m shooting Hornady SST 129grain heads.
    RL 15
    Federal Match primers

    I have got on well with it and it's shooting sub MOA at 200yards and just about cloverleafs every time at 100yards…. If I do my bit! I have taken a number of deer with it and very happy with the performance.

    It is my understanding however that this inherently accurate calibre is capable of even more with a little uber fine tuning!

    My question is what is my next step?


    Thanks in advance,
    Miles
    crack on with shooting it ?
    Right where's those stones , I'll start !

  4. #4
    Quote Originally Posted by tackb View Post
    crack on with shooting it ?
    +1

  5. #5
    Stop playing with it and go out and enjoy shooting it, it's already more than accurate enough for stalking.

    If, on the other hand, you want to get into the anally retentive pursuit of diminishing group sizes go ahead and waste a lot of time and money

    (No offence intended!)
    There's room for all Gods creatures ........... right next to the mash and gravy

  6. #6
    Miles

    I've found competition has improved my performance in the field. Try and find a form of competition in which you can use your current kit with a target load.

    Regards

    JCS

  7. #7
    Hahaha thank you chaps! I take your point and I have indeed been shooting it and enjoying it.

    I suppose the point I was getting at is that I think with a very small amount of adjustment (ie +/- 0.1 grain of powder or adjusting seating by 2thou) I might be able to tighten the group further....

    Therefore, I suppose what I am asking is:
    1.) What load development process do you go through
    2.) Given I have reached this point with only making 1 grain increments with the powder and then 10thou adjustments to seating depth where would you suggest I go from here?

    I appreciate everyone's input, thanks chaps!

    Best,
    Miles

  8. #8
    The two easiest things to try (while keeping everything else constant) are powder weight and bullet seating depth.

    I usually start by looking at the powder manufacturers data and picking the recommended accuracy load and see how it performs with my kit with my bullet seated 10thou off the lands. If (and only if) I think it can be made better I'll do a range of powder weights to try, 10 each with a .5gr difference, 5 below the accuracy load and 5 above it (assuming it's within the maximum load recommendation).

    Then (hopefully) having found a better grouping I do more batches using the best powder weight but this time reducing the seating depth in increments of 10thou off the lands until I'm at the recommended COAL, for my Steyr this runs between 2.80 and 2.87" as it has a fairly large chambering. In my case the Steyr loves 168gr Nosler Custom Competition or A-Max seated with a COAL of 2.86" and 41gr of Viht N140.

    If you want to spend more time, if you find the preferred seating depth isn't 10thou off the lands you can run the powder charge tests again and check the results.

    That sounds a lot more complicated than it is but I hope it's some help. As usual I should point out that this is works for me, no doubt someone else will have a different/better/shorter method

    The important thing in group size chasing is consistency/repeatability, only alter one thing at a time and keep excellent records.

    Good luck
    Last edited by phaedra; 24-01-2014 at 16:06.
    There's room for all Gods creatures ........... right next to the mash and gravy

  9. #9
    Don't listen to the nai sayers ... Tinker tinker tinker I say.
    Even the best groups can always be bettered ..

  10. #10
    It cloverleafs at 100yds. How can you possibly improve on that for deerstalking? If it shoots that tightly I guess you are describing all the bullet holes on paper in some way cutting the edge of the bullet hole already made by the previous bullet. What's an improvement, one single hole measurimg 6.5mm for three rounds?

    You are already shooting better than most guys can so personally I wouldn't waist a bit of my time playing with that any further. Its deer we are shooting, not paper targets at a bench rest competition...

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