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  1. F

    223 Load Ladder Head Scratcher

    Thanks for all the replys so far. Now I just looked up the specs for the Prochrono and it says +/- 1% and with my calculations that is 25 fps if the bullet is traveling 2500 fps. So, am I correct to assume that in theory a 5 shot group with a max spread 50 fps could actually 0 fps?
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    223 Load Ladder Head Scratcher

    The one I call NATO has the cross in it directly across from the words. With that powder I would have a nice SD one 5 round groups then the next it would be bad, so I was trying to find a velocity node. Also, I don't want my gun to go boom, but I do wear Oakley Shooting Glasses just in case.
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    223 Load Ladder Head Scratcher

    It is one shot at each charge weight two different grasses everything else is the same. The bullet is Nosler Custom Competition 77gr HPBT. All the shots were shot out of a 700P with 26" barrel. I went through some of my older chrono data (unly up to 22 gr.) and the velocities somewhat matched...
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    223 Load Ladder Head Scratcher

    First thing I am wondering about is the 100+ fps change from one side to the other. Second why does the velocity increases then drops then goes up and drops again? Also, all shots were with in an hour starting with the low charge NATO and going to the top with that then doing the STD in the...
  5. F

    223 Load Ladder Head Scratcher

    I did a load ladder today with my 223 which was using Reloader 15 and Rem 7.5 primers. Can anyone try to explain this to me? I was using a Prochrono Chronograph and us ing a pair of flashlights for lighting starting on 22.6 grains NATO. Thanks for the help in advance.
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