Spine help for 'new' bow

[kwilson16]

I bought a new (used) 2008.5 Elite GT500 - 28.5" - 60 to 70 lbs.

My current arrows are 27" GT pro hunters 7595 with 100 gr insert/100 gr tip, blazers and standard nocks. D-loop and peep.

My question is for the software guys.

For optimal spine, up to what poundage can I shoot these arrows through this bow?

[JeffB]

I'm no software guy, but cut that short, at your draw length- I'd say you'd be fine all the way to 70-71 pounds or so.

On the GT500 I had 28.5"" draw, 62 pounds, shafts cut to 27.75"- blazers, 100 gr pt and a heavier than normal insert (Beman ICSH) I was a teeny bit overspined with a ICSH400.

[kwilson16]

Thanks Jeff: sounds promising. The bow is not here yet but I am a little worried about the shafts being too short. The guy that I bought it from siad he was shooting 27" shafts...

Both my programs show you a tad weak for hunting but good for target. Might try 75gr tips. Holy cow, according to both my programs, it says that bow should be kicking out that 463gr arrow at 310fps. Thats some serious power there.

[kwilson16]

Thanks Bigcountry!

Couple more questions:

Where can I buy this software? So I can do this myself.
I would assume I could also take a couple turns off draw weight if the spine showed weak? I hate to give up my 100 grain broadheads.
My arrows weigh out at 480 grains even so I am not sure where the weight difference comes from. Any idea?

I have never owned an Elite before but I guess I'll be sipping the kool aid when it gets here.

[brucelanthier]

ORIGINAL: kwilson16

I would assume I could also take a couple turns off draw weight if the spine showed weak? I hate to give up my 100 grain broadheads.

Turning down the DW a couple of pounds would be my preference. Changing tip weight would also affect FOC and at that kind of speed I would think a bit higher FOC would be better.

ORIGINAL: kwilson16

Thanks Bigcountry!

Couple more questions:

Where can I buy this software? So I can do this myself.
I would assume I could also take a couple turns off draw weight if the spine showed weak? I hate to give up my 100 grain broadheads.
My arrows weigh out at 480 grains even so I am not sure where the weight difference comes from. Any idea?

I have never owned an Elite before but I guess I'll be sipping the kool aid when it gets here.

Archers advantage can be got I think at Lancaster archery's webpage. Ontarget can be bought from Ontarget webpage.

Before worrying too much, tune it up and see how they shoot. Programs can only get you in the ballpark. if you have to move too far off dead center, then you might need to drop some head wieght.