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Shooting @ 600 for the First Time?

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  #8  
Unread 05-10-2012, 06:22 AM
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Re: Shooting @ 600 for the First Time?

At 600 yards a 2 1/2 mph wind error can cause as much as a 1 MOA deviation with your load. I would look closely at your vertical dispersion to get a rough idea of your non wind shooting variables. If your vertical group measurement are cocsistant with your 100-200 yard groups, it's a decent indication that you wind dope is of for the fliers. If you plan on progressing much further out than 600 yards, I would consider changing your bullet to the 175 SMK. The 168, due to the steep boat tail design, is believed to exhibit stability issues at the longer ranges.
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  •   #9  
    Unread 05-10-2012, 03:56 PM
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    Re: Shooting @ 600 for the First Time?

    Thanks for the replies..... I'm going to keep trying.

    Today there was little wind almost directly out of the north at about 3-5 mph. I was shooting at an angle of 160 degrees. This time I shot three groups of 5 rounds and I would go check the target for each group.

    This was at 600 yards again. Altough each group of 5 had 1 flyer 4 out of each group stayed within 1 MOA of each other with the smallest group at 3.25" The last 5 shot group where centered in the target for about a 5" group. The smallest was the 2nd group but was in the lower left corner of the target, I adjust a little too much from the first group which was high to the right. But got where I needed to be with the final group.

    I'm pretty satisfied but I know I'll have the same issues each time I move the target out further.
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      #10  
    Unread 05-11-2012, 05:57 PM
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    Re: Shooting @ 600 for the First Time?

    If you're shooting the Sierra 168...change! That bullet has a 13 degree boat-tail and any bullet with that design has the same drag function as a flat-based bullet! It's dandy...for what it was designed for which was 300 meter International competition but a long range bullet...it ain't! Go either with the Sierra Palma 155 gr. or the 175 gr.!
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      #11  
    Unread 05-12-2012, 07:12 AM
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    Re: Shooting @ 600 for the First Time?

    Quote:
    Originally Posted by Sharpsman View Post
    If you're shooting the Sierra 168...change! That bullet has a 13 degree boat-tail and any bullet with that design has the same drag function as a flat-based bullet! It's dandy...for what it was designed for which was 300 meter International competition but a long range bullet...it ain't! Go either with the Sierra Palma 155 gr. or the 175 gr.!
    So which would you recommend for 600 to 1000 yards? The 155 or 175?
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      #12  
    Unread 05-12-2012, 08:57 AM
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    Re: Shooting @ 600 for the First Time?

    I shoot the 168 grain a-max and accuracy doesn't seem to be an issue to 1000??? It definatley isn't at 600 yards where I have shot a ton. I have thought about going to the 175, but this gun holds sub .5 moa groups with my current load...I have had all sorts of people tell me that the 168's won't carry to a grand, but I have seen diffrent results in the field ymmv.

    Jordan
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      #13  
    Unread 05-12-2012, 12:17 PM
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    Re: Shooting @ 600 for the First Time?

    My rifle has a 1 in 12" twist, will it stabilize the 175 SMKs?
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      #14  
    Unread 05-13-2012, 05:10 AM
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    Re: Shooting @ 600 for the First Time?

    Quote:
    Originally Posted by scsims View Post
    So which would you recommend for 600 to 1000 yards? The 155 or 175?
    If running a 1-13 ROT I'd go with the 155! Anything faster I'd go with the 175!
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