When I fist started hunting with a compound bow in the 80s, I had one sight pin set at 20 yds. I learned how to hold at 10 yds, steep angles, and out to 25 yds very well over the years. I've since gone to a more modern adjustable sight (still one pin) that I can set from 5yds - 50 yds on my bow. But, I still set it for 20 yds while waiting in my stand. Not becuase I expect a 20 yd shot, but because, I know that things can happen quickly, and I'll know what to do with a 20 yd pin, if I do not have time to change the setting. I still pratice all scenarios using the 20 yd setting "just in case" (out to 30 yds)- and I'm glad I do. The buck I shot this year for example busted in on a grunt tube, to 5 yds from the base of my stand. I did not have time to change the 20 yd setting, and used my 20 yd pin and held confident that the arrow would hit not where I was aiming, but where I wanted it to hit at that distance. The arrow hit within 1" of "my target".
I'm just curious how many other hunters use one pin - and if so, what are your range limitations - with that Pin? I'm confident out to 25 yds with mine - but given the chance - would always adjust my sight for the distance if I could.