grains per inch or grains per draw weight pound???

[Bob1961]

can anyone tell me how to find what grains per inch or grains per pound draw weight for my bow? and what is the difference of the two? also how that would determing what shaft to choose? my set up is 30" draw, set at 61 lbs, medium cams, plunger button with flipper rest 2, 31.25" xx75 camo 2117 arrows, with 5" vanes with left heilical, 145 grain bear razorheads, 43" axle to axle premiere patriot all wood laminated bow, finger release, 210 fps, one pin sighted in at 20 yds, with 4" groupes. i'm also going to switch beman ics carbon hunters. thanks for any info anyone can give me. bob

keep all your shots in the ten ring

[pdq 5oh]

Bob, gr per inch refers to arrow shaft weight. Gr per pound refers to total weight of the arrow with regard to draw weight. At 7 gr per pound, an arrow would weigh 490 gr for a 70# bow. 7x70=490. I'm not familiar with aluminum arrows, but carbons have a wide range of arrows in different weights and spine. Easton has an arrow selection chart that can help pick the correct arrows for your setup. I suspect with your bow you wouldn't want to go too light on the arrow. 5 gr per pound is the recommended minimum, but I think too light for your bow. I shoot carbons at just under 7 gr per pound.

Phil.

[FLHunter]

Bob,

You can shoot down to 5 grains of arrow weight per pound of draw weight without any bow damage. It is more noisier shooting at that grainage.

Aim Hard!

[Deleted User]

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