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Need educated. Pressure, FPS, and seating depth

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  #8  
Unread 10-14-2013, 10:08 AM
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Join Date: Jan 2013
Location: Meridian, Idaho
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Re: Need educated. Pressure, FPS, and seating depth

OK, good info guys. Thanks BMF for the feedback. I am well within the zone of the berger manual and keep thinking I have issues with pressure signs. The biggest issue I had was at 57.5 grains I was getting the occasional flyer. I reduced the charge in .5 increments to test accuracy at .75 off the lands, my normal load. I found 57 strung vertically and 56.5 was solid .25 MOA with no flyers. I then played with seating depth and found a little more accuracy at .100 off the lands and left it alone.

I just thought it was strange the speed would go considerably up and yet the case is not indicating the pressure has increased on the case head as much.

I did find that the ES was much better with bullet seated to the lands vs at .100. In fact I had 2 in my test that flew 2953 and 2954. In another test they flew 3000 and 2999.

Next time out I have more time to tinker and record results. This was just a test I wanted to try while dialing one of the kids 7mm-08 for the up coming hunt.
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  •   #9  
    Unread 10-14-2013, 11:16 AM
    BMF BMF is offline
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    Join Date: Jul 2008
    Location: Near Fowler/St Johns...Michigan
    Posts: 171
    Re: Need educated. Pressure, FPS, and seating depth

    This stuff will drive you bonkers sometimes. I feel your pain, I've been there. In the grand scheme of things, its not that big of a deal, especially in your situation because it sounds like you've got a good shooter. But it sounds like you're like me and its hard to let something go that doesn't quite add up. Good luck
    Brent
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      #10  
    Unread 10-14-2013, 11:46 AM
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    Join Date: Jan 2013
    Location: Meridian, Idaho
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    Re: Need educated. Pressure, FPS, and seating depth

    Remember this is in some frustrating wind so grouping is really unkown, could be error to the good or bad.
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