OCW problem...

  • I changed primers in my 175 SMK load, hoping to get a better SD/ES. Because I changed something I decided to reshoot my OCW just to confirm everything is still ok.

    I’m not sure where to go from here. I did this as a traditional round robin style OCW which I attribute to the higher number of “fliers.” That or concentricity, cause some of these were basically banana shaped (like .009+ tir).

    I’m going to throw out the bottom right and the top left (Factory/foulers). Unless someone can tell me which looks best, I’m just gonna go with the lowest Es/SD.
    <a href='http://i.imgur.com/HReIs2s' title=''><img src='HReIs2s.jpg alt='' title='Hosted by imgur.com' /></a>

  • @tackyp I would get between 7 & 8 if your steps are far enough apart to do so, otherwise shoot one half step below 7 and above 8 and see where the node really is. I know you don't need my advice but when shooting for group, like OCW, it is always best to have an aiming point you can quarter and a POI a known distance away from POA so you don't have issues with inconsistent aiming points. You're obviously a good enough shot that shooting out your aiming point is almost guaranteed.

  • Are they flyers? ... or are they groups?

    It's an important distinction. While it may be convenient to ignore the rounds that fall too far out, it isn't in keeping with good science. I can tell you without a shadow of a doubt, good rifles, with good loads, with good ammo, with a good shooter... do not produce as many flyers as I see there on the page.

    The real pursuit of the sport as a rifleman demands explanations. If I fire 100 rounds, and 20 of those rounds come largely out of group... those are not flyers. Flyers by their very definition are unexplained shots. If 20% of your shots are unexplained, there is a lot of work left to do. Much discovery to be made.

  • Good shooter would be the piece missing in this instance. The problem may be exacerbated by bad ammo.

    I was hoping the result would confirm that what I was using previously was still good, just with a lower sd/es.

    I’ll reload and reshoot. I can do better.

    ETA. I failed to mention that these are 1/10th increments. My original load is the middle right dot.

  • said:

    Good shooter would be the piece missing in this instance.

    Do you know this, or are you just being overly hard on yourself? Can you explain what took place on each shot? A factual accounting for each piece of the firing event can reveal exactly where the fault lies.

    If you don't know how to do that, then I hope to see you at our Advanced Rifle Concepts class in May!

  • A little of both.

    I know I can do better, because I have done better.

    Can I call each shot... no. I am improving though. When something goes wrong and the bullet goes somewhere other than where I intended, as above, I can usually tell why half the time.

    Its going to take more of that purposeful round count you spoke of previously.
    Thank you for the advice.