How much fat when home-grinding beef?

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donnieclark
How much fat when home-grinding beef?

I have three pounds of ground up sirloin beef cut up and ready for grinding. About how much fat would you add to the grind? 

please help.

Thanks.

 

I didn't find the right solution from the internet.

References http://www.discusscooking.com/forums/f48/how-much-fat-when-home-grinding...