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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Proper cronograph setup
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<blockquote data-quote="cmfi3" data-source="post: 195725" data-attributes="member: 7410"><p>Went out the other day and set up a "pro crono" cronograph for the first time. I mounted it on my spotting scope tripod, placed it 5-8 feet in front of muzzle, adjusted tripod and cronograph and centered it. I then set up my 7mm STW that has a muzzle break and fired off 6-8 rounds. I was getting some crazy numbers, a spread of more than 300 fps. Light was fading, fired a few more rounds and weren't getting any readings at all. What am I doing wrong?</p><p>Is the crono to close to the muzzle? is the muzzle blast from the break screwing up the reading? is the low light causing the no reading? What kind of height above the sensors does the bullet need to be traveling? I need some help, I dont want to waist any more rounds on this until I get some proper instruction.</p></blockquote><p></p>
[QUOTE="cmfi3, post: 195725, member: 7410"] Went out the other day and set up a "pro crono" cronograph for the first time. I mounted it on my spotting scope tripod, placed it 5-8 feet in front of muzzle, adjusted tripod and cronograph and centered it. I then set up my 7mm STW that has a muzzle break and fired off 6-8 rounds. I was getting some crazy numbers, a spread of more than 300 fps. Light was fading, fired a few more rounds and weren't getting any readings at all. What am I doing wrong? Is the crono to close to the muzzle? is the muzzle blast from the break screwing up the reading? is the low light causing the no reading? What kind of height above the sensors does the bullet need to be traveling? I need some help, I dont want to waist any more rounds on this until I get some proper instruction. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Proper cronograph setup
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