Don't think it was a dream. It was well over 50 years ago but I fired the .30 Carbine on just such a range because that was what was available at the time. It was the pistol range and was referred to in "inches" also. Why they didn't call it a 25 yard range I have no idea but then why did the military call lots of things by something other than what may have seemed the obvious.
I didn't get instruction on the 1911 back then and it is still obvious today.