Arrow Spine - Newbie

[Stealth78]

Hello all,

First time posting on a trad forum so I'll try not offend too many of you with my inevitable incorrect use of Archery jargon.

Alright, my first ever batch of arrows - as advised by a larger archery outlet was a set of GT 3555 hunter expeditions which are rated at a .500 spine and 7.4 GPI ~ fairly light.

Got some 125gr. tips and had the standard inserts, nocks, the works. my arrows weighed in about 375 uncut at 30".

They fly fast but upon copious amounts of online reading through forums I found most peoples arrows weigh in for at least deer hunting around 450 gr. So I bought some of GT's screw in weights (70 gr worth per arrow) for their system and am pending placing them in my arrows.

My question is, are the hunter 3555 (blacks) too weak to support that much weight up front on the arrow? They'd come in around 448gr with about a 19.4% FOC.

My current set up is a samick red stag - I'm pulling just about 30" at around 55#.

Should I invest in a stiffer arrow? Potentially the 5575?          

Thanks and God bless,

Tim

[moebow]

Stealth,

  GPI (grains per inch) isn't very  important except for calculating overall arrow weight.  GPP (grains per pound) is the overall arrow weight compared to your bow's draw weight.  A pretty good range is from 8 to 12 GPP.

Don't confuse arrow spine rating with arrow weight, they really aren't very related.

You may be better off with the 5575 at your draw weight and length.

Arne

[Stealth78]

I added it in must have been right before you posted, my apologies.

[moebow]

Ya I thought there was more info after my initial attempt. So now my answer is kind of screwed up.      

[Bjorn]

Stealth welcome to Trad Gang!          

[Shawn Leonard]

Yup, you will need to go up to a .400 spine. I have killed deer with 8gpp. and it is plenty but without knowing your exact bow, I would go with a 31" .400 spine and start out with at least 225 grains of point weight and most likely you will need a bit more point weight than that. Shawn

[Stealth78]

Thanks so much for the help Shawn and Arnie.
You have any preference of Arrows as I'll be lookin for new ones now?

[VictoryHunter]

Gold Tip Traditional Arrows. Great quality and quite a bit heavier. Welcome to the gang!