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February 25, 2012, 11:19 AM | #1 |
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Join Date: November 16, 2010
Location: Arkansas
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First time out with my chrono
I didn't shoot it, so yeah I'm happy. I was getting a lot of extreme reading at first and by trial and error finally got up and going. I found most of my loads were close to what I thought they would be.
I had one load of 45acp down lower than I wanted and one set of 9mm plated push 1200 fps, yikes. Great shooting round and very accurate but my gun would eject the brass to the next county. I thought they may be a little warm but found they're just hot. Next batch will be about 3gr lighter and will see how they work for accuracy. I shot about 400 round and other than checking my POA and POI for each gun everything else went over the chrono. How often do ya'll use your chrono? Just for checking new loads or everytime out? I guess I'm getting soft, rubbed a blister on the inside of my thumb.
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February 25, 2012, 11:29 AM | #2 |
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Join Date: March 4, 2010
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Dropping down 3 grains in 9mm might put you below the recommended starting load.
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February 25, 2012, 11:58 AM | #3 |
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My bad how about .3 grs
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February 25, 2012, 12:03 PM | #4 |
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Join Date: December 23, 2005
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How far did you set the Chrony from the muzzle?
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February 25, 2012, 12:04 PM | #5 |
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Hey looky, looky, I just made 1000 posts.
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February 25, 2012, 12:06 PM | #6 |
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Checking new loads is usually sufficient.
As long as the components and loading methods are consistent, and for the same gun, an occasional spot check is all that is needed. As you discovered, if there's something amiss, it will be evident.
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February 25, 2012, 12:25 PM | #7 |
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I use mine only to research new loads. I've only shot it once
It did survive.
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David Bachelder Trinity, Texas I load, 9mm Luger, 38 and 40 S&W, 38 Special, 357Magnum, 45ACP, 45 Colt, 223, 300 AAC, 243 and 30-06 |
February 25, 2012, 12:29 PM | #8 | |
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Quote:
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February 25, 2012, 02:54 PM | #9 |
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Muzzle blast can cause erratic readings, as well as pieces of unburnt powder being detected by the instrument. Sunlight can be problematic, too. Occasionally the odd angle of sun or a little reflective glint can cause a momentary inability to be accurate. Magic? Seems like it.
Sorry I can't be more help, but in general: Set the instrument as far as possible from the muzzle of your gun. In direct sunlight set the diffuser screens properly over the sensors. In open shade with clear blue skies, try with and without sensors and see which seems to work best. Under partly cloudy skies where the sunlight is intermittent, wait a while and hope the weather changes. Under even, light overcast, count your blessings. That is the best light for your chronograph. Good luck. Lost Sheep |
February 25, 2012, 04:12 PM | #10 | |
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Quote:
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February 25, 2012, 08:54 PM | #11 | |
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Quote:
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February 26, 2012, 09:52 AM | #12 |
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The good part is I now have a database for my powder, my bullet and my gun.
I know published velocity is a ballpark figure and every gun will be different. The published loads are like being in the upper deck with the chrono loads it's like being in the first row. I can see whats happening and get a better feel of the game.
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