IBO Speed
01-05-2005, 02:52 PM
#11
Thread Starter
Join Date: Dec 2004
Location:
Posts: 132
RE: IBO Speed
Right, I realize that. It was one of the factors that caught my eye. Comfort far out ways speed in my book. It could be the fastest bow on the planet, but if it doesnt feel right in my hand, I wouldnt even consider it.
01-05-2005, 03:01 PM
#12
Join Date: Feb 2003
Location: Blissfield MI USA
Posts: 5,293
RE: IBO Speed
01-06-2005, 07:53 AM
#13
Nontypical Buck
Join Date: Feb 2003
Posts: 2,358
RE: IBO Speed
Couple of points:
- IBO the group has NOTHING to do with IBO speed ratings. Its named that because IBO 3D rules state 5 gr/lb arrow weight. IBO the group has nothing to do with it and is NOT a certifying body, nor is it an industry standard. AMO speed (540 gr arrow at 60 lb, 30 inches) IS an industry standard, but results in a MUCH lower speed so isn't as "cool" looking as IBO spped. Your "real" speed will be somewhere between em probably.
- the IBO speed is VERY hard to achieve. Everything you do to a bow to make it shootable slows it down, anything on the string, peep, loop, nock point etc, slow it down.
- 350 gr arrow at 70 lbs is pretty tough to do without going underspined and very tough to do with a broadhead due to BH weights.
Use the IBO rating as a comparison only. If one bow is IBO rated at 315 and another at 295 you can tell which will be faster, but don' t be suprised if you don't get that number.
My bow is IBO rated at 305, I shoot it at 30 inches (IBO does to), 65 lbs (5 under IBO) and 400 grain arrow (50 over IBO), with a loop and peep sight. I get 270 fps.
--Bob
- IBO the group has NOTHING to do with IBO speed ratings. Its named that because IBO 3D rules state 5 gr/lb arrow weight. IBO the group has nothing to do with it and is NOT a certifying body, nor is it an industry standard. AMO speed (540 gr arrow at 60 lb, 30 inches) IS an industry standard, but results in a MUCH lower speed so isn't as "cool" looking as IBO spped. Your "real" speed will be somewhere between em probably.
- the IBO speed is VERY hard to achieve. Everything you do to a bow to make it shootable slows it down, anything on the string, peep, loop, nock point etc, slow it down.
- 350 gr arrow at 70 lbs is pretty tough to do without going underspined and very tough to do with a broadhead due to BH weights.
Use the IBO rating as a comparison only. If one bow is IBO rated at 315 and another at 295 you can tell which will be faster, but don' t be suprised if you don't get that number.
My bow is IBO rated at 305, I shoot it at 30 inches (IBO does to), 65 lbs (5 under IBO) and 400 grain arrow (50 over IBO), with a loop and peep sight. I get 270 fps.
--Bob
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