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Author Topic: IBO Speed Ranges?  (Read 1042 times)

Offline konrad

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IBO Speed Ranges?
« on: September 23, 2010, 07:26:16 AM »


Most bow manufacturers’ advertising gives IBO speeds as part of their sales spiel. Most of those specifications cover a range (typically 8 fps) or make claims “up to X fps”. Only one company I come to readily advertises a specific number without a range.

Given the IBO specifically states draw length, arrow weight and draw weight, what does this range of numbers represent?

Is this standard deviation, extreme deviation or some other range I am unfamiliar with?

Thanks again,
Konrad
“The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter can not be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles.”

Col. Jeff Cooper

Offline Lowedog

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Re: IBO Speed Ranges?
« Reply #1 on: September 23, 2010, 08:20:40 AM »
I believe that the range is what the manufacturer is saying they found in testing.  I don't believe there is any standard deviation that manufacturers are required to be within.  They can pretty much say what ever they want but from the reading I have done and from testing several bows most of them are pretty accurate.  

Bowtech actually sends a "birth certificate" with each bow that has the actual speed recorded on it at the DL and DW that the bow is set at when it is test fired.  
"Ethical behavior is doing the right thing when no one else is watching- even when doing the wrong thing is legal."
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