GPP Question

[roundbal]

I am a newbie trying to learn fast. My hunting arrows and practice (field tip) arrows fly the same with no kick or wobble. But I have been doing some reading up on GPP so I did the math and I am only at around 7.5 to 7.6 GPP in the bow i plan to hunt with. I believe I will be ok on penetration if I am lucky enough to get a shot and connect with a deer (have a lot of bear around to), but am I damaging my bow slowly by not shooting a heavier arrow? I don't want to make any changes now as hunting season is less than 2 weeks away, but I do intend on installing some 100 grain inserts after hunting season is over. Just looking for some facts,opinions, and suggestions from the pro's at TradGang!

[Orion]

That's on the light side.  Some bowyers won't warrant their bows for less than 8 gpp.  I would think your bow(s) would be on the noisy side due to light arrow weight.  Why wait to try a heavier insert?  The increased weight won't affect drop much out to 20 yards.  Even adding 100 grains, you'll still be shooting a fairly light arrow.

[Bjorn]

7.5 gpp puts you under 400 gns-right? As Orion says that is light and raises warranty questions-as well as noise which is especially bad for deer hunting.
You can add the inserts and add a bit of material to your side plate to accommodate the change in dynamic spine. A matchstick under the leather will work just fine-or shorten your shafts. Don't forget the pics!

[JimB]

You might try putting a length of 1/4" poly rope in one shaft and see how it flies with your broadheads.I'm not normally a fan of internal weights but it shouldn't change flight a lot and may work plus,if it doesn't,easy to remove.

For sure,if you add a 100 gr insert,it will change everything and you may not have enough stiffness in that 3555 to make it work.Next year you might try either a heavier shaft or a 5575 with more wight on the front and....start a little earlier figuring all that out.Good luck with it.

[roundbal]

If my math is right my arrows (tipped) weigh 421 grains not counting the wrap or feathers.

Gold Tip Expidition Hunters: 8.2 gpi (30") = 246 grs
Nock and Insert at 11.5 grains each        = 25 grs
field tip or broadhead 150 grains          = 150 gr
Total                                      = 421 gr

This may be all wrong??

[roundbal]

Also plan to hunt with the Coup stick that is in my signature and I draw around 27.25". Haven't checked in a while

[roundbal]

ttt

[stevewills]

419 is what i got you didnt add the nock and insert right should be 23 not 25 and you can add 12 to 15 grains for feathers...i got lucky i shoot axis full metal jackets 400s and a 29 inch arrow with 220 up front i got 560 grains and i shoot a 56 lb.bow....

[JamesKerr]

i would want something a bit heavier, but your setup will definately kill a deer if you make a good shot and don't hit solid bone. I personally would be worried about the low Gpp on you bows over 50#

[Jason R. Wesbrock]

If your arrows are properly tuned and you swap standard inserts for ones weighing 100 grains, your arrows will no longer be tuned. I would never sacrifice proper tuning just to add 80 grains of arrow weight. A light arrow that flies straight will penetrate much better than a heavy corkscrew.