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View Full Version : Arrow spine question!!!!!!!!!!!!!!!!!



Speedykills
03-26-2011, 02:42 PM
Arrows: gold tip 5575 black cut at 28"-1/2",I shot these last year out of my 2007 browning illusion bow set at 56#,now im shooting them out of my firecat at 60#+ or-,dont know exact draw weight,limbs are all the way in.
Question could these arrows at 56# be spined perfect then on my firecat because of higher poundage be a bit under spined and cause flight differences!

archerx7
03-26-2011, 03:16 PM
Allowing 61.5#'s on your setup, OT2 shows those arrows to be weak and well out of the green, assuming 100gr. points and 15gr. for fletching.

With the Browning @56#'s they are in the green just on the stiff side.

To get into the green with the FC you'll need to drop back to about 59#'s. You'll still be on the weak side, but they should tune ok.

martinbowhunter
03-26-2011, 03:17 PM
You should be fine if your shooting 60# out of your firecat. I shoot 69# out of my firecat. So because of this im now shooting GT 7595 with a 125 grain tip. and to me the 7595's fly better than the 5575 did with my set up. And my arrow's are cut to 29 1/2"

parttimr
03-26-2011, 03:36 PM
By the charts I believe I'm on the edge either way for 5575 or 7595 but they sure fly great with the 5575's and blazers.

Speedykills
03-26-2011, 05:20 PM
Allowing 61.5#'s on your setup, OT2 shows those arrows to be weak and well out of the green, assuming 100gr. points and 15gr. for fletching.

With the Browning @56#'s they are in the green just on the stiff side.

To get into the green with the FC you'll need to drop back to about 59#'s. You'll still be on the weak side, but they should tune ok.

Very intresting.

Spiker
03-26-2011, 08:27 PM
My Firecat at 29" 62# likes 28.25" 7595's.