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Thread: Shorten your .17 HMR ???

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  1. #3
    Member Happy's Avatar
    Join Date
    Oct 2012
    Location
    Waikato
    Posts
    4,052
    The spread is the inconsistent speeds of the factory ammo so at 22" length there were chrony readings 103 fps seconds different between highest and lowest so they averaged the 5 shots.

    The rifle was cleaned and crowned identically after every inch cut off.
    There were lots of sites where 19 inches for the .17 was the fastest fps measured and a good spot if looking for peak fps.

    For say 16" which is 6" shorter than current 22" with no loss in accuracy (due to possibly getting a better crown than what,s been done)
    25 Fps loss of speed for the round with lets face it , say max range of 200 to 250 in no or f all wind should be fine is really the question

    Or is that a huge difference which could cause problems ? Suppose I m unsure of what changes in fps mean but this is a small one ..
    "This is my Flag... Ill only have the one ..

 

 

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