Have you tried hooking up to the string without the eliminator button under the nock? That definitely changes things. I have had a few bows that tuned and shot very well with no eliminator button under the nock, but I haven't owned anything as short as the Defender.

WA try moving the drive cord to the cable slide. jim

WA, that's not all that bad considering an arrow pushing the 400gr mark. What all is on the string and where is it located. String accessories can really rob a bow of speed, and the closer to the string's center the worse it gets.

Jim,
Can't move to the slide, it's a sims teflon. Came on the bow.

BGfisher,
I have the hush kit, string loop, and a true peep on the string. I think I got the readings I did because the chrono requires the arrow length to be put in on the front of it. I measured the arrow like you normally would, valley of the the nock to the end of the insert, omitting the tail of the nock and the point length. I was back at the shop and asked if that was correct. He said no, it is the total arrow length. He said by not putting in the entire length, I am probably 10 FPS or so slow, this would be about where I thought it is shooting, mid to upper 280's. These arrows are pretty light at 390 gr. I plan on increasing them to the 420-430 gr. range for hunting, which will slow me down some.