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tracy warren

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Reply with quote  #1 
Went over to a friends house yesterday. He has been playing with chronograph lately and he’s been telling me about these bow speed he gets. Now before you get on a high horse and start lecturing me about not caring about speeds, neither do I. I’ve just never had access to a chronograph before and thought it would be interesting.

My friend has a true 31” draw. I didn’t test my bows at my 28” draw. We still used arrows that weighed 10gpp with the bows drawn to his 31”. He said his Howatt Hunter get 191,192 every time he shoots it.
I had two surprises of my bow. The bad surprise was my Bigfoot Sasquatch. It only got mid-180’s shooting 10 gpp and drawn to 31”. Kirk sent me better numbers best I remember when I bought it, though he was shooting it out of a machine so I know you get better with a mechanical release. Still not shabby.

But the biggest surprise was my JD Berry Vixon. He shot a 9gpp arrow through it and first shot was 184. We looked at each other like what the?. The next two shots were 187,188. (Drawn to 31” with additional bow weight figured into arrow weight. Still 9gpp.

The Hatfield Take-down with10gpp arrows was 188,199 every time.

My buddy couldn’t believe the Vixon. I told him JD Berry was a witch doctor with longbows.

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Gypsy

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Reply with quote  #2 
As I have five of his bows, I tend to agree with you that he makes a fine bow.
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timking

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Reply with quote  #3 
First, a chronograph is an incredibly useful tool in determining the efficiency of a hunters set up and shooting style...
Second, the worst thing with clocking a bow is the owners getting down on it because of the numbers given. Remember the human factor in the equation...my crappy release can cause a race car to come to a complete halt.
I assume that you are talking about bows that are x poundage rated at 28”, and taking into consideration the additional estimated #12 of additional draw weight by clocking them at 31”?
Is your gpp calculated at that higher draw weight? HUGE difference if not...scaling a 10gpp arrow and a sub 9 can be night and day on speed.
I probably have clocked a hundred different bows, @28”, and anything over 180 with a true 10gpp+arrow is an anomaly...now you throw in that additional 4” of draw length and everything changes.

I agree that Mr Berry’s bows are efficient, as well as being beautiful.

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Charter Member Traditional Archery Society
Dallas, Texas
this season I am shooting...

62" #60 Black Widow MA
62" #60 Bob Lee Ultimate

Widowmaker 350 Carbon shafts,
250gr. VPA 3 blade,
225 gr. Iron Will 4 blade, 





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steelflight

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Reply with quote  #4 
A very nice little experiment
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James Donahue

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Reply with quote  #5 
Kinda been testing my bows the last few weeks (recurves,Hybreds,ASL's)   Decided  that for what I do the ASL's  fit me best -If was a strict target shooter  the Recurve would  win out- but stumping and hunting  and plain  nice to shoot I will stay with my ASL's DSC06027.jpg 

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tracy warren

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Reply with quote  #6 
Tim Kong, yes. Actual draw weight at the 31”draw was used so we were still dealing with 10gpp on all except the Berry Vixon and those speeds we recorded on it were at 9gpp.

Yes crappy release can give inaccurate information.

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timking

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Reply with quote  #7 
Wow, then I would say that’s a great example of the advantage of a really long dL!
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Charter Member Traditional Archery Society
Dallas, Texas
this season I am shooting...

62" #60 Black Widow MA
62" #60 Bob Lee Ultimate

Widowmaker 350 Carbon shafts,
250gr. VPA 3 blade,
225 gr. Iron Will 4 blade, 





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silverarrow

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Reply with quote  #8 
A 31” draw length would certainly make an impact on speed. If I’m not mistaken, I heard or read that every inch of draw past 28” increases speed by about 10’ per second. So, if what I read was true, then you are looking at an extra 30’ per second.
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mparker762

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Reply with quote  #9 
Quote:
Originally Posted by silverarrow
every inch of draw past 28” increases speed by about 10’ per second.

that's more or less true if you don't keep gpp constant with the increased weight. If you are shooting the same arrow but pulling back the greater distance then you will see 7-10 fps/inch. if you keep the gpp constant at the longer draw weights then the increase is still significant, but more along the line of 2-3fps/inch. I did the math in a post a few weeks back that wound up matching very closely to the chronograph results, I'll see if I can find the link...
https://www.traditionalarcherysociety.com/post/asl-speed-68-5031-just-curious-10180759


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