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OCW test with PP 2000 MR .308 @ 200 yards.

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  #1  
Unread 06-04-2013, 12:25 AM
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OCW test with PP 2000 MR .308 @ 200 yards.

I performed this OCW test @ 200 yards using PP 2000MR. Rifle is a Blaser R8 23.7 " barrel. Any thoughts on what OCW might be ?

THX, Jimmy
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OCW test with PP 2000 MR .308 @ 200 yards.-img_20130603_202112_533.jpg  
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  •   #2  
    Unread 06-04-2013, 06:42 AM
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    Re: OCW test with PP 2000 MR .308 @ 200 yards.

    Looks to me like they all shoot pretty good. All are under about 1 MOA.

    I'd shoot three 10-shot groups, one with 46, one with 47 and the last with 48 grains. That'll be a better test, in my opinion.
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      #3  
    Unread 06-04-2013, 10:48 AM
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    Re: OCW test with PP 2000 MR .308 @ 200 yards.

    I believe I would go with the 46.2. The method as I understand it is to narrow down a charge that has larger window of accuracy to either side of the given charge to allow for subtle changes in temperature etc that would otherwise swing accuracy greatly. at 46.2 you have such from what I can see. With all the charges hovering around MOA, if this were my rifle I would call it good. You may tighten that up even more if you have not yet tweaked in seating depths.

    Of course, If I am off base in my understanding of OCW, then the above is useless.
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      #4  
    Unread 06-04-2013, 04:10 PM
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    Re: OCW test with PP 2000 MR .308 @ 200 yards.

    I would do an other ocw test with tenth grain increments from 46.0 to 46.7 you may hit you node a little better some where in there
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    Unread 06-04-2013, 05:07 PM
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    Re: OCW test with PP 2000 MR .308 @ 200 yards.

    I would not use any increment smaller than 1/2 grain. Too many shots from adjacent 1/10th grain groups will over lap each other. It even sometimes happens with 1/2 grain increments, especially if each load's accuracy ain't all that great. And many loads with a 3/10ths grain spread in charge weight will shoot no worse than 1/2 MOA at 600 yards; 1/3 MOA at 300 and 1/4 MOA at 200.
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    Unread 06-04-2013, 05:51 PM
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    Re: OCW test with PP 2000 MR .308 @ 200 yards.

    No clear winners IMO. Not with 3 shot groups like that. I would repeat them all @ 300 yds on a no wind day.
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      #7  
    Unread 06-04-2013, 07:49 PM
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    Re: OCW test with PP 2000 MR .308 @ 200 yards.

    What is your ES and SD? Need a chrono for that.

    That is one of the flaws with OCW, short distance and not using a chrono does not tell you what it might do at longer ranges.

    ES over 25 or so and your LR groups go to pot.

    I would shoot from 46.0 to 47.2 in .3 gr increments over a chrono. Others may disagree but Oh, well.

    Pick the best load and then reshoot for seating depth variation again over a chrono.
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