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Main Boards => PowWow => Topic started by: burch on April 12, 2011, 07:28:00 AM
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I need to know how to determine my draw length to get bow weight. After I get my draw length how do I calculate the bow weight ? The AMO on my bow is: 58" - 45# @ 27.5
Burch
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For your draw length. Get a full length shaft say 31" in length or longer. Then get a clothes pin. Attach the clothes pin to the round shaft about 7" below the end of the shaft. Make sure the clothes pin is vertical with the free end of the clothes pin pointing towards the ground. Then slowly draw the shaft to your anchor point. As you come to your anchor point, the clothes pin will hit the front of the bows shelf and slide down towards the end of the shaft. When you come to your anchor point, the clothes pin will stop. Then slowly let down and measure the distance from the valley of the nock to the clothes pin. That distance in inches will be your draw length.
Do this a few times to get a good average of your draw length. Your draw length distance should be very close every time.
If you have a draw length scale, just draw the scale to your anchor point and then read the weight.
If you don't have a draw length scale, take your bow to an archery shop and the shop will measure the poundage at your draw length by drawing it to your draw length with a weight scale.
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You can also figure about 3 lbs an inch from the 45 lbs.
Bowmania
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One thing to note....even though the bow SAYS it's 45# at 27.5 it might not actually be. There is some significant margin for error there...especially in older bows. The single best way to discover your actual draw weight is to have it measured on an accurate bow scale at your precise draw length.
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o.k. using the clothes pin trick i`m getting between 28" & 28-1/4"
so using the 3 lb method i`m shooting around 48lbs right or wrong ?
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also I need to figure arrow length. I don`t see how to determine that before bare shafting tuning your arrow. Can anyone answer that ?
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For each inch you add or subtract 3 lb. You are 1/2 inch over you can add 1.5 lbs to 45lb = 46.5lb.
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Originally posted by archer66:
One thing to note....even though the bow SAYS it's 45# at 27.5 it might not actually be. There is some significant margin for error there...especially in older bows. The single best way to discover your actual draw weight is to have it measured on an accurate bow scale at your precise draw length.
I agree with what your saying and i`ve heard that many times. How ever - My bow was built by Zach Ferguson who is the son of Byron Ferguson and we`ve all heard of `ole Byron and watched him many times on the t.v. So do we say it`s safe to say Zach knows what he`s doing since he`s had his pappy to school him along or do ya think I should have it checked out :dunno:
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Originally posted by snag:
For each inch you add or subtract 3 lb. You are 1/2 inch over you can add 1.5 lbs to 45lb = 46.5lb.
I KNEW THAT :biglaugh:
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Originally posted by burch:
Originally posted by archer66:
One thing to note....even though the bow SAYS it's 45# at 27.5 it might not actually be. There is some significant margin for error there...especially in older bows. The single best way to discover your actual draw weight is to have it measured on an accurate bow scale at your precise draw length.
I agree with what your saying and i`ve heard that many times. How ever - My bow was built by Zach Ferguson who is the son of Byron Ferguson and we`ve all heard of `ole Byron and watched him many times on the t.v. So do we say it`s safe to say Zach knows what he`s doing since he`s had his pappy to school him along or do ya think I should have it checked out :dunno: [/b]
I'm not busting your chops here...just trying to help...I'm a newbie too so what I'm telling you is fresh in my mind because it was just explained to me by folks who are helping me find my way in this awesome sport. I don't know what his accuracy level is....I do know that if you order a Black Widow you pay extra if you want the final weight within 1 pound of what you requested. It is awfully easy to step into a bow shop and have them help you measure your EXACT draw weight at your draw length. I imagine you can get away with not doing it just fine...but if it is a bit off you might find yourself having trouble tuning your bow due to improperly spined arrows. :dunno:
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Oh and a good rule of thumb for choosing arrow lenth is to go 2 or 3 inches longer than your draw length. You can cut them down if need be but ya can't add to them once they are cut off.
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Originally posted by archer66:
Originally posted by burch:
Originally posted by archer66:
One thing to note....even though the bow SAYS it's 45# at 27.5 it might not actually be. There is some significant margin for error there...especially in older bows. The single best way to discover your actual draw weight is to have it measured on an accurate bow scale at your precise draw length.
I agree with what your saying and i`ve heard that many times. How ever - My bow was built by Zach Ferguson who is the son of Byron Ferguson and we`ve all heard of `ole Byron and watched him many times on the t.v. So do we say it`s safe to say Zach knows what he`s doing since he`s had his pappy to school him along or do ya think I should have it checked out :dunno: [/b]
I'm not busting your chops here...just trying to help...I'm a newbie too so what I'm telling you is fresh in my mind because it was just explained to me by folks who are helping me find my way in this awesome sport. I don't know what his accuracy level is....I do know that if you order a Black Widow you pay extra if you want the final weight within 1 pound of what you requested. It is awfully easy to step into a bow shop and have them help you measure your EXACT draw weight at your draw length. I imagine you can get away with not doing it just fine...but if it is a bit off you might find yourself having trouble tuning your bow due to improperly spined arrows. :dunno: [/b]
I know your not busting my chops and I thank everone of you for all the help. Believe me Sir i`m absorbing all of this. I was just havin` a little fun :D
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It varies on a lot of bows but as Snag said once you get to 27-29"s it usually is about 3#s per inch. Shawn