So, educate an old Southern boy on grouse shooting. What is a good average, hits to misses?
SRH
I saw it written somewhere that you'll hear 2 birds flush for every one you'll see (this leaves out the runners), for every two you see, you'll be able to get off a legitimate shot at one (safety, time and all that, "legitimate" meaning "aimed and not just a salute"), and if you're a good shot to begin with, you'll hit one of every two to three you get a legitimate shot at.
So, if you're doing well and a good shot to begin with, you'll bring down somewhere between about 1 out of 12 to 1 out of 8 of the birds you actually flush.
That's what the author said and, if it's in a book, it must be true. It seems true to me and my experience.