Here’s a tip - tape the quarter to the middle of a bullseye target that you can see at 100 yards. That way, you should be able to do it with any scope - or iron sights like I can 
Touche’ lol. My eyes arent as good as they use to be…so its either see the target without my glasses or see the iron sights with them lol.
last week i shot a perfect bullseye at 72 yards… with my bow