Minimum arrow weight question

[Okieboy]

I have a buddy who shoots a six year old PSE Mojave and clearly marked on his bow is a minimum total arrow weight of 420 grains. He's only pulling 65 pounds and I've read that the minimum total arrow weight should be 5 grains for every pound which would be 325 grains......Is there something that we don't know? Will the bow experience a catastrophic failure if he shoots under the 420 marked on the limb? We're very curious. Due to this he's shooting 340's and doesn't think he can go to 400's. I say he can. We need help.
Thanks Y'all,
Shawn

[Vabowman]

I shoot a 365 gr arrow @ 73lbs pull.

[Okieboy]

Exactly my point.....I also shoot a much lighter arrow and I think he could too. But he's afraid his bow will somehow "self-destruct" if he does because it states not to shoot one under 420 grains......I think that's just a "CYA" statement from PSE for litigation purposes myself............

[SteveBNy]

5gr/lb is an IBO measurement and one used by most manufacturers as their warranty limit.

If that's what the bow is marked, that is their limit.
420 has only been a 'heavy" hunting arrow for the last few years - prior to that, it was cosidered med to light.

Steve

[Vabowman]

I was shooting a 309 gr arrow at 73# and did not know it!! I switched to a heavier arrow, Easton Axis 400. I think Easton is backwards in their weights tho. I think their 340 is heavier than a 400??

[Okieboy]

I guess I can see your point.....That bowprobably wasn'tdesigned to fling an arrow lighter than 420. He should probably trade it in on a newer model......

[YooperMike]

You are correct on the Eastons VA. The do go backwards in weight, I shoot FMJ 300s, they are the heaviest, as compared to the 340 and 400s.

[Okieboy]

I'm new to cardon arrows but I thought ALL of the manufacturers used the same sizing system:
300 - Heaviest
340 - lighter
400 - lightest

Is this not true?

[Vabowman]

Nope. I shoot the PSE X Force and the 400 Axis fall under the correct weight.