Weighing Copper Pennies for Counting

I'm wondering if any of you have tried to weigh copper pennies to get an Accurate count, versus running through a counter? I've been experimenting with putting pennies into a bowl on my scale, and 100 pennies come out to 10.8 oz every time, down to the exact count. Obviously I'd like to do this for a larger amount every weigh in, as I'd like to fill up some $50 bags. Just curious on some successful or not so successful feedback for any attempts at this.
Thanks
Thanks