[quote]Rangeball,
My measurements are a little different. I chronographed my arrows with both 75 and 100 grain heads to see the speed difference. I got exactly 5fps with my setup. But that is my point I guess, each bow will react differently to draw length/weight changes as well as arrow weight changes.
So my FSLite at 300 IBO looks like: -40fps (50#), -15fps (1.5" draw), -15 fps (fletch, rest, string loop, peep) for a result of 230fps. Add 3fps for the lighter arrow and I should see 233fps. I chrono at 218 - 219.
This is why it would be nice to get some insight from either a bow designer or someone who has setup and chronographed a lot of different bows to see which bows are the best performers at 50#. [quote]
Corb, I agree, however their are a TON of bows out there that can' t produce anywhere near their advertised IBO. The bows I mentioned have a reputation for delivering stated speeds, to the best of my knowledge. I' m not familiar with PSE, so I don' t know where on the spectrum they fall.
To All Bow Manufacturers,
Bowtech does a great job in their manuals showing the IBO speed derating curve based on draw length. It would be nice to also have a derating curve for draw weight changes. This would make it much easier to compare products and select the best bow for the application. Not many dealers (or ANY dealers?) will setup 10 bows for you to your draw length/weight, add a nock and rest on each bow, and then let you chronograph them all. This information has got to be easy for a manufacturer to produce.
I wholeheartedly concur... I wish Bowtech would go this extra step, and all other manufacturers would jump on the band wagon.