Why 10 Graines per pound?

as far as i know mark- it relates back to a good hunting weight- to help facilitate better penetration, whilst still maintaining a reasonable trajectory.
why exactly 10 gn per#  

Doesn't have to be, you could maybe go down to 8. It has a lot to do with having enough arrow weight to protect the bow from damage. As in a super light arrow could replicate a dry fire.

I guess that's ok roy     :rolleyes:        

Thanks guys

too true Roy

I think Roy is right on. I think 10gpp vs 9 or 8 is totally arbitrary ... Someone just rounded to 10 and it stuck.

Mine are 15.6 GPP.  If they were 10 GPP, they would come in at 430 grains.  That does not bode well for penetration in elk size game.  Guess lighter would be better on targets but I just keep it simple.

Monterey, I also tend to shoot relatively heavy arrows, mainly cause I shoot relatively light bows mainly.

I find that I can't shoot accurately at distances that are long enough to make arrow speed matter at all.

I agree on the heavier arrow for larger animals.

I think 10 gpp is a good hunting weight for me while it maintains a decent trajectory.

I keep all of my setups right around 10 gpp from 45 lb bows to 85 lbs and can switch between them with little if any adjustment.

Ben, same thing happens to me at much over 20 yards.  My heaviest bow is 50# and it bothers my left shoulder.  

Guess it doesn't matter much to us guys who can get close to their game        

 
last one i shot, was at 6 yards, last one i missed was at 5 yards             - oops!!

LMAO

My wife got so close once that she had to swing the bow away from the deer till she drew to avoid poking it with the arrow.  Deer scooted before she got it drawn.

I gotta fess up here, I once missed a buck at 5 yards broadside while standing on the ground. Shot low, LOL... Then he ran 5 yards and stopped, so I shot over his back. He ran 5 yards and stopped again, I shot over his back. He ran 5 yards and stopped, I said "out loud", ok you win, now get the hell out of here.. True story... I think it's called buck fever  

alright..won't be too hard on ya cause ya came clean..and made me laugh.

...but I think some people are better off hunting like this..  

Hahaha that's just too much Roy.

It happens to everyone. First time I had a shot at a deer I was 5yds away and also missed .... With a gun. ... Yeah that's called buck fever