340 is the amount that the arrow flexes when released and 50/65 is the poundage the arrow is rated for.You would use that arrow on a bow set from 50 to 65 pounds.
__________________
HIGH COUNTRY SPEED PRO X10 "SPEED KILLS",HHA site,Carbon force Mayhem/Easton Fat Boy Arrows,Alpine quiver,TM hunter and Swhacker Broadheads.
|