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deer not dear thats some poor spelling

But then you need to add in the accuracy of the rifle so .4Moa-.5Moa @ 500yards plus muzzle velocity variation. still probably a dead dear.

What kind of chronograph? If in doubt try some long range target shooting and look at the vertical spread. I have had good results with the 143 eldx in my 260. Im the same as R93 i dont think my OCD...