View Full Version : underspined?

Smarta Way
05-04-2009, 07:39 PM
my father bought a new firecat and the dealer set him up with some arrows i think are under spined. he shoots 27 1/2 DL, they gave him 26 7/8" easton st epic 400 shafts. im thinking he will be forced to shoot at 55lbs and a 100gr BH with this. Am I off base? He wants to shoot 65-70lbs and use 125gr BHs.

05-04-2009, 09:33 PM
At 65- 70 lbs 400 spine should be good, though i would use 100 gr. BH, going to 125 will weaken the spine a bit more...:)

Smarta Way
05-04-2009, 10:06 PM
thanks for your reply. i have ontarget2 and after i put his specs in it says he is way underspined even with a 100 gr head. What am I not looking at correctly/?

05-04-2009, 10:48 PM
easton websight http://www.eastonarchery.com/pdf/09-hunt-selchart.pdf

I think i read it right :confused: double check... :o

05-16-2009, 08:24 AM
Im shooting gold tip 5575's which are a 400 spine with 100 gr. rages and shooting at 70lbs. and 28" draw works great for me.

05-17-2009, 01:27 AM
He should be just fine at 65# with a 125 grain head. Getting up around 70# I'd try them but probably a 100 grain head would work better. He is certainly not underspined with 27" 400 spine at 65#.

Maybe you're not entering the right data into OT2, but don't take computer programs as gospel either. They're just like paper charts. Just a guideline.