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55gr 223 for 3gun help


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I use cfe223 under a hornady 55gr fmj w/cannaluire.  Do I need to worry about a minimum FPS or just what groups better with less standard deviation. Do I need to check grouping at 100y or 50y?  

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What groups best . Initial test at 100y. Then test at max distance you will /can shoot.

Testing at 50y is a waste of time. My junck ammo will shoot under 1/4 in at 50y.




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  • 2 weeks later...

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