You're safe with 400 spine; and the length of your arrow varies according to personal preference, but usually your arrow extends between 1/2" to 3" in front of your arrow rest. One inch has quite a few followers. Shorter arrows are lighter and faster.
Here; do some reading. :wink:
http://www.huntersfriend.com/arrowhelp/arrow-selection.htm
Here; do some reading. :wink:
http://www.huntersfriend.com/arrowhelp/arrow-selection.htm