I know it can be done with one pin... but, I really like being able to say I was dead on or off when I shoot. I think having a pin every 10 yards lessens the impact of range estimation errors. If I say it's 30 and it's 34 or 35 I will probably still get a hit. I'm not sure that would happen if I'm using a 20 yard pin(for which I would have to guestimate hold over) and I'm already guessing range... It's just more precise to have my 20, 30 and 40 yard pins. And yes, I'll shoot in a minute at 40 if the right target presents itself. I'll wait if I think I may get a better look, but if it isn't going to happen..... I'm shooting. I know you can become accustomed to hold over. I do it myself even with my pins at every 10 yards. I'll fudge up or down with a pin for odd ranges at like 24 or 28 or something like that... but it's done with at least ONE known... where precisely to aim. Now all I have to do is have the range correct. For those who say they like one pin because they don't want to use the wrong one in the heat of the moment..... that's called Buck Fever.[:-]

Another point... if I'm shooting at 260 fps my arrow would be 20 and 1/2 inches low at 40 yards if I used my 20 yard pin. That would be a heck of a lot of hold over to calculate in the woods in a hurry. I want to hit closer than "The Deer Somewhere".