Follow this link http://www.goldtip.com/calculators/k...?rnd=197743665 to use Gold Tip's KE calculator.
Here's their recommended KE for various types of game. Anything 50 ft lbs and up and you have nothing to worry about.
Although if you're going after Grizzlies with your archery tackle - not only do you need your noggin examined - but you might want to ensure a KE in or around 70 - 75 ft lbs of energy.
20 ft. lbs.Small Game - Birds, Rabbit, etc.. lbs
30 ft. lbs.
40 ft. lbs. Medium Game - Deer, Antelope, Bear
50 ft. lbs. Large Game - Elk, Moose, Caribou
60 ft. lbs.
70 ft. lbs.
80 ft. lbs.
This one will give you youe FOC on your arrows. Recommended here is anything between 10% and 14%.........some folks go as high as 15% or as low as 8%
http://www.goldtip.com/calculators/foc.asp