A little help please

[longbawl]

Hi All I have a new to me vortex Its 50@27 An 58" I draw 27 3/4. I have tried several arrows The best so far is a goldtip trad 3555 29 3/8 long with 150gr tip an 100gr insert. It shoots great bare shafts great also. Heres the thing i only have the one arrow to try. I have read about spine being inconsistent. What do you guys think should i buy a doz. 3555 or go with the heritage 150. If i go with the 150s how much longer will i need to make them.
Thanks for any help

[JRY309]

GT's had some problems years ago but there quaility controll has greatly improoved.Call John at Sipsey River he sells both the GT's and Carbon Express Heritage shafts.I shoot both of them in different bows.If you go with the 150's start full length and tune from there before cutting them down any.Everyone shoots alittle different,so I can't say how much longer the 150's would need to be.Both the 35/55 and 150's spines are close to each other.