Are you using a hand held scale? - because those are famous for showing 10 lbs low
Yes, I am using a handheld scale, and I do hear that they are low - especially at the higher poundage levels. Also - good guess that my DL is over 29". I played around with the draw stop on the infinity cam to increase my DL, so I would guess it's around 29.5". I went to the local pro-shop to compare my arrowspeed chrono to theirs. Using the same arrows out of my MM, there was a difference between the two chronos - but only about 3 fps on average. The wierd thing is that my chrono would be 2-4 fps faster than theirs on one arrow, and then 1-3 fps slower on the next[:@]. So I really didn't prove anything other than they are all subject to a percentage error. The pro-shop also had a handheld scale (only) - on my bow it measured 67 lbs. Regardless, the deer aren't impressed with how fast an arrow is anyway. Now if I could just get one within 30 yds

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