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Post by elk4me on Feb 19, 2006 3:37:24 GMT -5
OK guys........ I am at a loss for this one. I was at my archery shop and my bowtunner got a new PC Program for arrow selection that ya compute all your specs on a bow and arrow in the chart and it tells ya what the arrow that is correct spine and weight for your bow. The CX arrow chart says Terminator 45/60's,Heratiage,Maxmia,Eliminator 250,CXL 250,Line Jammer 250 ,but buy the PC program ya enter in speed and all the other reg parameters(arrow length,Inserts wt,nock wt,gpi,and tip weight) it suggests with my bow speeds I should use TR 6075,HME 350,CX300,CXL350 and LJ350's ? Can this be true? Do arrow mfg.'s not take into consideration for high speed bows? Maybe this is also a reason I am having flight problems,even tough the chart's say I am splined correctly................ Because of my outrageous speed am I under-splined?
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Post by ScottC on Feb 19, 2006 6:52:35 GMT -5
I don't know all about the parameters, but I was told because of my DRAW weight (60#), I needed to shoot 250's.
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Post by michihunter on Feb 19, 2006 9:22:03 GMT -5
I believe I mentioned something like this to you when we were figuring out your possible problems. I'd go with the 300's or 6075's for a better matched spine.
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Post by elk4me on Feb 19, 2006 16:58:37 GMT -5
We'll first we are gona change the rest and see what that dose! Then if we have no fletch contact then we are gona try the change of arrows and spline ;D. Scott I am only shooting a 50# DW, but will turn it up to 60# as the practice season goes ;D.I am kinda anxious to hear what Bowtech has to say on this!
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Post by hoosieroutdoorsman on Feb 20, 2006 16:24:33 GMT -5
Speed isn`t a real arrow issue for choosing the proper arrow. Tip weight and length of arrow and draw weight determine your spine.Your overall arrow weight will affect your speed, the terminators are heavy arrows and even with your black knight it will slow your speed down.If you are going to turn up to 60 lbs I would go no lighter than a 300 grain arrow finished weight.If your arrow length is under 30 inches a CX200-250 will be fine, if over 30 then you would need the 300 or 350.Those programs are good for a round about area to choose, as for speed affecting an arrow that is where the proper spine comes into play, to light and it will flex and wobble,,to stiff and will lean.
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Post by elk4me on Feb 20, 2006 20:57:49 GMT -5
Hoosier my arrow legnth is 27 3/4" from nock throat to insert tip.( without a fp or Broadhead) ;D
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Post by bowtech on Feb 20, 2006 21:33:54 GMT -5
There is a speed determination in correct sizing of an arrow and charts are set up on a 280 scale. That being said , it takes a truck load of speed to break out of a spline range and therefore it becomes irrelevant unless you are already against the wall. Michi. makes a good point as to the ease of stability that comes with a stiffer spline (in carbon) but you are not out of your spline range yet. You should be 75 to 85 gr. weight on the head to be perfect but 100 is not out of line. Go for 10%FOC with your set up
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Post by elk4me on Feb 21, 2006 2:03:13 GMT -5
;D hey Bowtech check this out! FOC or Point Weight for a desired FOC Calculator Arrow Bare Shaft Weight: 274 = (264gr shaft+ 10 gr for wrap) ;D Broadhead or Point Weight: 100 Point Insert Weight(if any): 12 Nock Weight: 8 Total Fletch Weight(all 3 or 4): 15 Length of Arrow(inches) from nock to tip w/point or broadhead: 28 1 / 4 FOC= 10.2%
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Post by hoosieroutdoorsman on Feb 21, 2006 4:44:51 GMT -5
Looks like you are in pretty good shape, I like keeping my FOC right around the 10% range as well. When you are choosing your arrow and know what you bow is shooting if close to or over 300 like BT said just stay in the middle of spin chart and you won`t have any probs. I agree with BT as well on you will notice better flight with a 85 grn tip.
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Post by bowtech on Feb 21, 2006 7:30:38 GMT -5
I forgot all about the vanes Elk... The 85gr. would help your spline slightly but the 100gr. is giving you the FOC you want. I have to stop thinking feathers when addressing others issues
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