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  • mks's Avatar
    05-03-2013, 12:43 PM
    mks replied to a thread Figuring free bore in Gunsmiths Corner
    If you really want to go the math route, you will need to know the leade angle and type and dimensions of the bullet ogive. This will get you...
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    14 replies | 1030 view(s)
  • mks's Avatar
    05-03-2013, 09:51 AM
    mks replied to a thread Ladder Test in Centerfire Benchrest
    Maybe I've just been lucky, but my ladder tests look like stairs. There are ranges of charges with reduced vertical dispersion. When I plot vertical...
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    15 replies | 1389 view(s)
  • mks's Avatar
    05-02-2013, 02:49 PM
    mks replied to a thread reading The Wind / Wind Probe in General Discussion
    There is a lot of truth in this. Based on sighter shots, you want to adjust your aim and shoot only while the probe readings remain the same. When...
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    12 replies | 900 view(s)
  • mks's Avatar
    04-30-2013, 07:32 AM
    mks replied to a thread Load Tuning for temperature in Centerfire Benchrest
    Tim, It is curious that poi does not shift with an increase in barometric pressure, and does suggest that internal ballistics is affected....
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    43 replies | 3112 view(s)
  • mks's Avatar
    04-29-2013, 10:32 AM
    mks replied to a thread Load Tuning for temperature in Centerfire Benchrest
    Greg, I am not so sure about "far and away the largest." That depends on the temperature/pressure sensitivity of the powder. I don't have burning...
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    43 replies | 3112 view(s)
  • mks's Avatar
    04-29-2013, 10:01 AM
    mks replied to a thread Load Tuning for temperature in Centerfire Benchrest
    Tim, Thanks for the thought-provoking data from long range. Gene and I have discussed air density and back pressure on the bullet before on this...
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    43 replies | 3112 view(s)
  • mks's Avatar
    04-27-2013, 12:52 PM
    mks replied to a thread Load Tuning for temperature in Centerfire Benchrest
    These are good questions. The burning rate of the powder depends on both temperature and pressure, which are related to each other by the ideal gas...
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    43 replies | 3112 view(s)
  • mks's Avatar
    04-27-2013, 11:45 AM
    mks replied to a thread SD and Barrel Harmonics in General Discussion
    Boyd, Sorry, I shouldn't have offered you as an example of the entire evolution of the concept, but only the "just before the peak" idea from...
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    71 replies | 3239 view(s)
  • mks's Avatar
    04-26-2013, 03:36 PM
    mks replied to a thread SD and Barrel Harmonics in General Discussion
    It seems to be hard for people to get away from the "tune to the peak" concept. So hard that many, like Boyd (I don't mean to pick on you), just...
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    71 replies | 3239 view(s)
  • mks's Avatar
    04-24-2013, 10:38 PM
    mks replied to a thread Load Tuning for temperature in Centerfire Benchrest
    Ken, Yes, the heat losses do depend on temperature. Convective heat losses to the barrel depend on the temperature difference between the...
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    43 replies | 3112 view(s)
  • mks's Avatar
    04-24-2013, 10:33 AM
    mks replied to a thread SD and Barrel Harmonics in General Discussion
    What you are looking for in a ladder test is small groups from shots with a range of powder charges. It doesn't matter where the center of the group...
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    71 replies | 3239 view(s)
  • mks's Avatar
    04-24-2013, 10:13 AM
    mks replied to a thread Load Tuning for temperature in Centerfire Benchrest
    Greg, You have lots of good questions. The reaction rate is a factor. It increases with temperature and pressure (see Fig. 10 in...
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    43 replies | 3112 view(s)
  • mks's Avatar
    04-24-2013, 09:21 AM
    mks replied to a thread Load Tuning for temperature in Centerfire Benchrest
    Ken, Quite the opposite, energy losses are deterministic from temperatures and the other characteristics of the system. Or according to the...
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    43 replies | 3112 view(s)
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1 Visitor Messages

  1. Dan H
    View Conversation
    Keith, I have instructions for that turner if you are interested. I think it is set up to turn at .0084" you'll like the finish. I used to take two passes, using the pumpkin for the final pass. I would blow the 220 brass out first then size it, expand it then turn = just going into the shoulder on the final pass to clean up the shoulder some.
    Good shooting today. I think I learned something today with my setup, that was after I dropped two points, I'll verify it at the next shoot.

    Dan
    danhonert@bellsouth.net
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08-15-2008