Only way to know if you can put a group of arrows in a pie plate (or whatever your criteria may be) is to go back there and shoot.

I'm thinking you'll realize your groups expand as you go backwards. You won't hold that grouping, constant to 50yds.

Just go back and shoot.

You should be practicing 75% of your shooting from 2X the distance you hope to be using as your max ydg, anyways.

Good luck.