A good day of prairie dog hunting is hard to determine. I realize the OP is asking for our own individual opinions. I would have to say the hit% is way more important than the quantity. They go hand in hand of course, but I always try to shoot 60% knowing that I have to shoot well in the beginning when the dogs aren't scared and just peeking out of their holes from 250yds +.
Where I shoot you can sit in one spot for 30 minutes before you get a shot every 10-15 minutes. I've done it, but I'd rather crawl on my belly to the top of a hill and shoot without them realizing im there.
I suppose in a day if I can hit 60% of the shots I take, have a confirmed hit past 400 yds and kill 12 dogs an hour that's a pretty dang good day to me. Oh, and do it with handloads that I can look back at in satisfaction by their performance and accuracy. Sharing that moment with my daughters, son, father, brother or a pal is better than doing it solo.
Andy
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”Self defense is a primary law of nature, which no subsequent law of society can abolish; the immediate gift of the Creator, obliges everyone to resist the first approaches of tyranny.”
~Elbridge Gerry