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up front weight
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Topic: up front weight (Read 143 times)
hitman
Trad Bowhunter
Posts: 1612
up front weight
«
on:
July 02, 2011, 06:21:00 PM »
Here's another question about spine and weight up front. I am shooting a black widow PSA at 47# at 28"draw. I'm shooting POC arrows at 29 1/2 in. to BOP with 125 g. points. How much will spine increase or decrease by adding more weight up front, say 160 grain.
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Black Widow PSAX RH 58" 47#@28
Samick Sage 62" 40#@28"
PSA Kingfisher RH 45#@28
Treadway longbow RH 60" 46#at 28"
W.Va. Bowhunters Association life member
Pope and Young associate member
Mississippi Traditional Bowhunters life member
hitman
Trad Bowhunter
Posts: 1612
Re: up front weight
«
Reply #1 on:
July 02, 2011, 06:26:00 PM »
O yeah, I forgot to add this. My total weight is 505 grains with 3-5"shield feathers.
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Black Widow PSAX RH 58" 47#@28
Samick Sage 62" 40#@28"
PSA Kingfisher RH 45#@28
Treadway longbow RH 60" 46#at 28"
W.Va. Bowhunters Association life member
Pope and Young associate member
Mississippi Traditional Bowhunters life member
JimB
TG HALL OF FAME
Trad Bowhunter
Posts: 3778
Re: up front weight
«
Reply #2 on:
July 02, 2011, 07:11:00 PM »
With my carbon arrows,30",about 18 grs more point weight would weaken the arrow 5#.
Now Stu's calculator says going from 125 gr to 160 equals 8# weaker spine.
I'm not sure how much spine with woods but add point weight and it will weaken your dynamic spine.My wild guess would be that going from 125 to 160 would weaken spine 8-12 #.The only way to know how much change would be to bare shaft with both weights.
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Shawn Leonard
Trad Bowhunter
Posts: 7837
Re: up front weight
«
Reply #3 on:
July 02, 2011, 11:53:00 PM »
I was told by many oldtimers that 25 grains would decrease the spine by 5#s so 6-7#s would be about right. Shawn
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Shawn
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