Mine is in that 10% or less range...often much less...104 calories for 45 miles with 2000 ft of climbing is one example. I wore a BodyBug calorie recorder the other day and it registered a realistic total that had no connection to what the Garmin recorded. But I will try the hard reset and fitness level and use the BB to calibrate it. Thanks for the suggestion.

And I agree about the rapid satellite fix. Little if any wait time