First load development results .243AI

Discussion in 'Rifle' started by spamassassin, Aug 17, 2017.

  1. spamassassin Well-Known Member

    Member Since:
    Aug 8, 2014
    Message Count:
    1,114
    So far it's averaging .63" which works out to .6MOA even with the fire forming load. I've got about 75 rounds fire formed so just another 175 and that will done and I can move on to final load development.

    The group in the top row of dots is 5 shots. I could have done better behind the gun so it's not as good as it should be.

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    Also did some scope tracking testing. At one point during the testing my windage knob came unsecured and stopped registering clicks so I had to re-zero and then re-do the box drill. Scope tracks like a train.

    And some fireform vs. loaded
    [IMG]

    And the rounds for the seating depth test.
    [IMG]


    http://boxtobenchprecision.com if you want to get your own copies of this target. They're just being publicly released. I'm doing an article on them for an e-magazine. They're not paper, they're plastic so you can tape em up and pull em down and write on them with pen and it'll never tear or poke through. You pretty much can't tear them by hand and bullet holes don't act as initiation sites for tears even with multiple bullet holes touching.

    the whole target with my box test and click value test bullet holes and re-zero'ing holes.
    [IMG]
  2. GrocMax Active Member

    Member Since:
    Jun 12, 2014
    Message Count:
    166
    On first seating depth tests try not to make such big jumps, more like .005"-.010" increments. 20 rds 3 shot groups you'll see a clearly superior range and find the 1st and 2nd orders. Most barrel/bullet combos will have multiple 'good' depths say .030"-.045" apart, with a big change you'll pass right over them and muddy up the data.
  3. spamassassin Well-Known Member

    Member Since:
    Aug 8, 2014
    Message Count:
    1,114
    Going out this weekend. Trying to do a B2B target for as many rifles as I can. I have 6 targets on hand now. Got to order another 10 pack.
  4. spamassassin Well-Known Member

    Member Since:
    Aug 8, 2014
    Message Count:
    1,114
    First round from proper Ackley cases, 3030-3170fps. 10 shot groups. Called all the flyers.
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    Keith likes this.

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