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Main Boards => PowWow => Topic started by: DKdc on December 23, 2011, 03:20:00 PM
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I just got some weight taken off my bob lee signature and am trying to see if I can get my old arrows to work. Because there are so many theories about tuning I am a little confused. I will just tell you what is happening. My fletched arrows are hitting close enough to the bullseye i.e I am not a great shot. my bare shafts are hitting at least a ft directly low and the nock is flying and hitting high and to the left. I have moved the nock point down a few times and seen no change.
my set up is a bob lee signature
-62# at 32 inches
-beman ics bowhunter full length arrow spined at 300 with 250 grain up front.
- arrow is 9.5 grains per inch with a 5 grain per inch weight tube
any help would be appreciated thanks DK
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You may be TOO low of a nocking point. A nock TOO low can also show a nock-high bare shaft, because it bounces off the shelf before it leaves the bow, throwing the nock end of the arrow high. The change in weight may have also changed tiller slightly, so you may have to modify where your correct nocking point should be. SO, try a much-too-high higher nocking point and drop it a little each time until you tart seeing that high-nock bare shaft come down to even or just ever-so-slightly high.
Change only one thing at at time and shoot several times to see the pattern (i'm not a good shot either)
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Just judging by your point weight I would say you are way under spined. A beman 300 at 32 inches is like 80 pounds maybe at 28 with a 125? A 250 is gonna put you at a 30 or 40 pound spine. That heavy point is gonna make arrow flight really erratic. Try a 100-160 grain up front. Bet that cleans it up real nice for ya. Better to be over spined and fly a little stiff then to be under spined and be hitting all over the place. Im thinking a 140 - 160 grain head might be perfect.
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Thanks for the input coilspring I will let you know what happens.
DK
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Ok I will try that as well thanks Bucksbuouy.
thanks DK
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any suggestions on where to start with knock point or brace height.
DK
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Here's what Bob/Rob recommends...scroll down about mid-way, pick your bow type and you'll see their recommendation
http://www.bobleebows.net/videos_bowcare.html
Below that (on the left side) is their video of setting your brace height.
Isn't this FUN? :)
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With a traditional bows I usually start my brace height around 7" for longbows and 8" for recurves. I start with a 1/2" high nocking point and go from there. I would say you are to weak as well. Try a 150 grain point and see what happens.
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O.L.Adcock's method of bare shaft tuning worked for me