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When I first got the bow it was at 29" DL and I cranked it down to 70lbs and put a 403 grain arrow through it at 276 fps. The DL was a bit short for me so I bought a 29" ZX cam which yielded a 29.5" DL. At the same 70lbs I put a 403 grain arrow through it at 297 fps. Now I know that 5+fps or so was due to the increased 1/2" in DL so I estimate the cam swap gave me 14-16 fps. Also, the stock EZ7 advertises IBO of 321 and the Z7mag advertises 340 IBO. Take 5 fps off the Z7 Mag for the difference in brace height on the E-Mag and you'd have 335 IBO which in comparison to my results tracks about right. After all of this initial testing and comparing I backed my E-Mag down to 65lbs and did not chrono any more. I should mention that I did have to move the D-loop and nock point down 1/4" after the swap as well. I know it's a Frankenstein setup, but after checking around the bow is literally identical to a Z7mag with just a bit less reflex so I was comfortable with it.
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