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What speed is your hunting bow (chrono, not ibo listing)
06-08-2006, 10:04 PM
#31
Join Date: Jul 2003
Location:
Posts: 2,052
RE: What speed is your hunting bow (chrono, not ibo listing)
After reading this post I checked my bow today at work.
Switchback XT 28" 70# 80% Wisker Biscuit (med hole) loop and Surzapeep
With my hunting arrows: 26.5" Gold Tip XT Hunter (55/70) 100grn fp 2" Blazer vanes= 283-284fps consistently.
Out of curiosity I tried a 29.5" XT Hunter with 4" vanes 100grn fp and got 265fps.
Speed was measured with a screw in digital chrono.
RA
Switchback XT 28" 70# 80% Wisker Biscuit (med hole) loop and Surzapeep
With my hunting arrows: 26.5" Gold Tip XT Hunter (55/70) 100grn fp 2" Blazer vanes= 283-284fps consistently.
Out of curiosity I tried a 29.5" XT Hunter with 4" vanes 100grn fp and got 265fps.
Speed was measured with a screw in digital chrono.
RA
06-16-2006, 05:47 PM
#32
Join Date: Jun 2006
Location:
Posts: 8
RE: What speed is your hunting bow (chrono, not ibo listing)
http://www.archeryexchange.com/information/info_pages/amoibo/amo-ibo.shtml
A.M.O.(Archery Manufacturing Organization) and I.B.O. (International Bowhunters Association) both have a method for testing arrow speed from bows and although they are different both can be used to compare equipment for relative speed.
Both of the speed testing standards use a constant drawlength, arrow weight and bow weight to test bowspeed. These are the way the two differ.
A.M.O.
Under this standard the bow being tested will have a maximum pull weight of 60lbs. The arrow will have a grain weight of 540(9 grains of arrow weight per pound of bow weight). The draw length will be set at 30 inches. The chronograph used for measuring the speed will be placed at point blank range for testing.
I.B.O.
Under this standard the bow being tested will have a maximum pull weight of 70lbs. The arrow will have a grain weight of 350(5 grains of arrow weight per pound of bow weight). The draw length will be set at 30 inches. The chronograph used for measuring the speed will be placed at point blank range for testing.
What is important about these two speed ratings is that they are only to be used to compare bows speed tested under the same standard. They should NOT be used to tell you what you will personally shoot for speed. For example lets take an average archer……Bill Bowshooter……..Bill has a 29 inch draw length shoots his bow at 65 lbs and shoots a 455 grain aluminum arrow. In our example neither the A.M.O. or the I.B.O standards will accurately reflect the speed of Bill’s bow. Since Bill is shooting a shorter draw than both standards, shooting an arrow that weighs 7 grains of arrow weight per pound of bow weight, and is shooting 65 lb peak weight he will shoot at a speed very different to either standard.
If we try to make some generalizations about the two different ratings we could say that the I.B.O. speed rating is much faster than most archers could achieve, and conversely the A.M.O. speed rating reflects a speed that is less than what most shooters could achieve with the same bow. If a bows I.B.O. speed rating is 320fps and its A.M.O. speed rating is 245fps that would mean the average archer would shoot that bow somewhere in the middle of that range.
A.M.O.(Archery Manufacturing Organization) and I.B.O. (International Bowhunters Association) both have a method for testing arrow speed from bows and although they are different both can be used to compare equipment for relative speed.
Both of the speed testing standards use a constant drawlength, arrow weight and bow weight to test bowspeed. These are the way the two differ.
A.M.O.
Under this standard the bow being tested will have a maximum pull weight of 60lbs. The arrow will have a grain weight of 540(9 grains of arrow weight per pound of bow weight). The draw length will be set at 30 inches. The chronograph used for measuring the speed will be placed at point blank range for testing.
I.B.O.
Under this standard the bow being tested will have a maximum pull weight of 70lbs. The arrow will have a grain weight of 350(5 grains of arrow weight per pound of bow weight). The draw length will be set at 30 inches. The chronograph used for measuring the speed will be placed at point blank range for testing.
What is important about these two speed ratings is that they are only to be used to compare bows speed tested under the same standard. They should NOT be used to tell you what you will personally shoot for speed. For example lets take an average archer……Bill Bowshooter……..Bill has a 29 inch draw length shoots his bow at 65 lbs and shoots a 455 grain aluminum arrow. In our example neither the A.M.O. or the I.B.O standards will accurately reflect the speed of Bill’s bow. Since Bill is shooting a shorter draw than both standards, shooting an arrow that weighs 7 grains of arrow weight per pound of bow weight, and is shooting 65 lb peak weight he will shoot at a speed very different to either standard.
If we try to make some generalizations about the two different ratings we could say that the I.B.O. speed rating is much faster than most archers could achieve, and conversely the A.M.O. speed rating reflects a speed that is less than what most shooters could achieve with the same bow. If a bows I.B.O. speed rating is 320fps and its A.M.O. speed rating is 245fps that would mean the average archer would shoot that bow somewhere in the middle of that range.
06-16-2006, 06:04 PM
#33
Spike
Join Date: Dec 2005
Location:
Posts: 69
RE: What speed is your hunting bow (chrono, not ibo listing)
I have a Tribute with 29 inch draw and set on 80 pounds. It has the fast mods and is able to shoot a 476 grain arrow 295.5 FPS. That comes out to be 92 pounds of KE. I'm going to bump my BH weight up to 150 so I should be right at 500 grains for hunting season.
06-16-2006, 07:46 PM
#36
Fork Horn
Join Date: Feb 2003
Location: Palmyra PA USA
Posts: 117
RE: What speed is your hunting bow (chrono, not ibo listing)
I can't vote. The 50 - 65# selfbows I hunt with shoot between 130 - 160 fps, depending on which arrows I use with my 25" draw.One of mytypical 60# @ 25" selfbows with610 grn arrows shoots 150 fps. I just built one that shoots 170, but that's with a 28" draw.To me, that's fast! [:-]
06-16-2006, 08:40 PM
#38
Dominant Buck
Join Date: May 2003
Location: Ramsey , Indiana
Posts: 22,545
RE: What speed is your hunting bow (chrono, not ibo listing)
I don't know or care , my rig is more than enough for consistant pass throughs , and that's all that matters . Anything above that would be nothing but ego , and that doesn't figure on my list . Speed thrills , accuracy kills , and that's the bottom line in anybody's book .
