Figuring out arrow weight

Illinoisbow · 07-15-2007, 02:22 PM

What do you guys do to figure out arrow weight? Say if i wanted to buy a Beman ICS hunter arrow which is at 8.4 grains per inch and i want it trimed down to 27 inches. I assume you multiply 8.4 times 27 and get 227 then add 100 for the field point to get 327. How much would i add to 327for blazer vanes and a nock point to find my total arrow weight?

Tikka 30-06 · 07-15-2007, 02:34 PM

Well, 2 inchers weigh 5 grains a piece and 4 inchers weigh 12 grains a piece. I assume you are shooting stock nocks so they should weigh 7-12 grains. This gives you a grand total of about 394-399 with 2 inch vanes and 415-420 with 4's. Sorry I couldn't find the exact weight for the beeman nocks.

Kanga · 07-15-2007, 02:37 PM

I would be more concerned about the spine than total arrow weight.

If you like I can run your set up through Archers Advantage but will need the bow info ie draw weight, your draw lenght, make model etc

Illinoisbow · 07-15-2007, 02:45 PM

Quote:

ORIGINAL: Ausie-guy

I would be more concerned about the spine than total arrow weight.

If you like I can run your set up through Archers Advantage but will need the bow info ie draw weight, your draw lenght, make model etc

That would be great Ausie. I'm shooting a Ross Cardiac with a 27 inch draw and 60lb draw weight.

Hope thats enough

Arthur P · 07-15-2007, 02:46 PM

Don't forget to add another 10-12 grains for the insert.

Kanga · 07-15-2007, 03:17 PM

OK AA came up with a finished weight of 371gr's using the 2" Blazers the FOC is 13.6 but the spine is all the way over into the red on the stiff side.

Even with a 125 head it is still showing as too stiff.

Now with the lenght cut to 29" 100gr head it is showing slightly stiff, 388gr's with a FOC of 12.9

Now if you want to get the FOC up there go with a 200 gr head cut the arrow at 28" for a total weight of 479gr and a FOC of 21.1 and slightly stiff on the spine, I would prefer to be slightly stiff than slightly weak when it comes to spine.

Illinoisbow · 07-15-2007, 03:39 PM

Thanks a lot Ausie! One more question though. If my spine is to stiff should i think about getting Beman ICS 340 over the 400? The 340 comes in at 9.3 grains per inch with the 400 at 8.4.

Thanks

Kanga · 07-15-2007, 04:08 PM

the 340 is a stiffer spine than the 400

Illinoisbow · 07-15-2007, 04:24 PM

Quote:

ORIGINAL: Ausie-guy

the 340 is a stiffer spine than the 400

Sorry so i guess that means i should also look into the ICS Beman 500 at 7.3 gpi?

treboryerf · 07-15-2007, 04:28 PM

Hey AUSIE if he went to say 64lbs or so in draw weight would'nt that help with the stiffer spined arrow too.