But those are calculated numbers. Calculations are nothing more than estimates. This seems to be a big thing over on AT but it is not accurate. However, from my experience, Hoyts do seem to shoot faster than some other bows at shorter draw lengths. Rarely do you see someone saying they got 10 fps faster at 30" draw and 70#. Which is what Hoyt uses to determine their rated speeds. Or any manufacturer for that matter. Some other manufacturers say they use ibo standards to check speeds. The grey area here is that can be 80# and 400 grain arrow. This will give the bow a bit more energy and subsequently, a few more fps. Some people do tune bows to go faster but I have already stated some of the ways to do it. The ironic thing is that it is all irrelevant. 10 fps un the real world means almost nothing. We as a hunting/archery community need to move past this marketing ploy and forget the chrono and go shoot. BUT The added momentum and ke is nice and the energy that today's bows produce without some of the negatives of bows of yesterday is an improvement. sent from my samsung note 2
Marketing hype. I believe accuracy is more important than speed. If I get there first but miss the kill zone it really doesn't matter. RC
With that post, I have to admit I am also unaware of how IBO works. Any clarification would be greatly appreciated. I see what the IBO rating is for my bow (354+), and I do understand the rating is based off of a certain draw length, particular arrow set up as well as drew length. Ive have chrono'd the speed of my bow myself which stated 340 fps. That being said, can you help explain what this means?
IBO rating is based on the bow set a 70#/30" DL/350gr arrow (5gr/lb) and no weight on the string. The second you deviate from any of those numbers and/or begin to add weight to the string (peep, nockets, loop, speed buttons, silencers, etc, etc., you are no longer going to get IBO speeds.
I usually test a new bow at IBO if I have 30 mods, which isn't a given since i shoot about 28.5 to 29...I have a 350 arrow made up for just that...All that aside I like know if I am being lied to...I expect a new bow to post close to their advertised IBO, understanding the variables involved in the testing. If its grossly off ( 4% or more) I want a reason...and for the record I haven't seen too many bows in the last 10 years that are way off their IBO numbers. You have to understand its fairly relative... For example you have a IBO advertised at 340IBO...you test it and it comes in at 330...that about 3% below the advertised IBO....not a bad margin of error considering all the variables involved.
Yes, I wanted to make sure I stated calculated. It is not meant for anything more than an estimate. I really only use it to play with. Estimate what a change will do, then see if it will or not. however, the more accurate your input is, the more accurate the output is. Again, can't stress enough that this is not necessarily real world. I have been able to nearly match my calculated values, but I am very particular how I do it. Also, I do not do this for speed. More for knowledge and to find a better hunting setup. Speed is not accuracy.
