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Rifles, Reloading, Optics, Equipment
Reloading
Heat and velocity puzzle (140g absolute hammers and 180 ELDM)
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<blockquote data-quote="HSmithTX" data-source="post: 2597301" data-attributes="member: 121677"><p>Get your lighting conditions under control and most of your problems are gone. Remember, this was THE technology we had to use for a long long time and it worked for a long long time. I used to check 'calibration' on mine with a known load, this was a load that I had run across MANY different chronographs so I knew what it should be and the ES of probably 150 rounds chrono'd was stupid low. I would set up and shoot the known load and 9 out of 10 times I was cooking with gas after that one shot based on the educated guesses I made during set up and I knew I was good to go because I saw exactly what I should see. If I didn't see what I needed I would flip the cardboard and shoot another one. Depending on where the sun was etc there were some occasions where I put it away to chrono later or another day because the light was just not going to let me get good data. The other thing you need to do is set up EXACTLY the same distance away. The one I used most had a corded display and that cord was exactly how far away I shot from every time. Additionally for distance shot from, further is a better option than closer especially with rifles, you don't need gas/ash/whatever going across the screens potentially messing up readings. I sold the last one I had and bought a magnetospeed, honestly I miss it because I can't do/don't trust accuracy testing with the magneto hanging off the barrel. I didn't have that problem with the optical unit. I will buy a doppler unit sometime soon but it's a lot of money to solve a problem I didn't have a few years ago.......</p></blockquote><p></p>
[QUOTE="HSmithTX, post: 2597301, member: 121677"] Get your lighting conditions under control and most of your problems are gone. Remember, this was THE technology we had to use for a long long time and it worked for a long long time. I used to check 'calibration' on mine with a known load, this was a load that I had run across MANY different chronographs so I knew what it should be and the ES of probably 150 rounds chrono'd was stupid low. I would set up and shoot the known load and 9 out of 10 times I was cooking with gas after that one shot based on the educated guesses I made during set up and I knew I was good to go because I saw exactly what I should see. If I didn't see what I needed I would flip the cardboard and shoot another one. Depending on where the sun was etc there were some occasions where I put it away to chrono later or another day because the light was just not going to let me get good data. The other thing you need to do is set up EXACTLY the same distance away. The one I used most had a corded display and that cord was exactly how far away I shot from every time. Additionally for distance shot from, further is a better option than closer especially with rifles, you don't need gas/ash/whatever going across the screens potentially messing up readings. I sold the last one I had and bought a magnetospeed, honestly I miss it because I can't do/don't trust accuracy testing with the magneto hanging off the barrel. I didn't have that problem with the optical unit. I will buy a doppler unit sometime soon but it's a lot of money to solve a problem I didn't have a few years ago....... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Heat and velocity puzzle (140g absolute hammers and 180 ELDM)
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