August 4th, 2008, 08:44 PM
The 5 grain per pound rule
How much stress do you put on today's bows by shooting a minimal 5 grain per pound arrow? Should we expect these bows to last for years under these conditions, or should we shoot heavier arrows? Thanks in advance for your input.
August 4th, 2008, 08:59 PM
If you shoot Barnsdale/Hoyt and Martins with laminated limbs 5grs. per pound no problems and PSE X Forces seams to be doing fine but not naming a couple and we all know who they are 5grs. per pound is not enough.
August 4th, 2008, 09:15 PM
I shoot every bow at 5 gr lb and have for years..... I shoot often and I shoot year round....... I have never experienced a bow or limb failure...... I shoot a lot of 3-d and IBO events and know a pretty big circle of people who do the same and also dont seem to have any problems...... Most limb failures seem to be pretty isolated to specific brands or models of bows.....
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August 4th, 2008, 09:23 PM
Surely the 5gpp rule of thumb is overly simplistic. The best guide to arrow weight is here:
August 4th, 2008, 09:53 PM
I think 5 GPP is pretty safe these days, except for the aformentioned blow-up prone bows . . .
Actually, I think in most cases with good equipment you can go below 5 GPP with no big deal risk. I shot my HCA (bansdale limbs) quite a bit this summer at about 4.2 GPP and 32" draw with no problems so far. (don't know what would happen after years of doing this though)
August 4th, 2008, 10:37 PM
This is absolutely true. It's a known fact that for any given arrow weight and draw weight a longer drawlength equates to more speed.This is because a longer draw stores more energy (stress) in the limbs. It stands to reason that a shorter draw stores less energy (stress) so a lighter arrow can be shot with a certain amount of safety.
Originally Posted by PB26
To that end I still stick to a 5gr/lb rule even at my 27" draw. Not because of some rule or warranty issue. Just because I choose to.
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August 4th, 2008, 10:49 PM
The 5 grain per pound rule
Year 2000 Hoyt UltraTec still going strong shooting 5.06 grs per pound - 286 fps.
Originally Posted by CDN
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August 4th, 2008, 11:06 PM
I'm down around 4.8 grain per lb... so far it's working out OK.
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