I had to try it for myself tonite.
I went to fifty and shot three arrows, not bad considering I just guessed at where the pin should be. I was shooting at a mckenzie deer and had all three from fifty in the kill zone. About a five inch group.Then at twenty all three were touching vanes in the heart!
I will now start shooting farther to increase my concentration.
Like they say on the Walker game ear commercials It worked for me....LOL