Arrow selection

[boxerjake77]

Right now I shoot the bear assault at 60 lbs.
I use GT expedition hunters 5575 arrows at
8.2 grains per inch. Are they too light to get
good penetration? I was told that I need to be
in the range of 8.6-9 grains per inch. If so, what is
a good arrow to use?
If I switch, will. Have to adjust my sight pins too?

 

[arlow]

8.2 is fine, just make sure you have good straight arrow flight. Poor flight will cause poor penetration.