Years ago, when I was in the ROC, as usual after our training exercises we couldn't do anything until after the debrief, so we needed to find something else. That was usually a map-reading exercise / treasure hunt, ending at a decent pub ...
This time, however, our officer had finagled us a visit to a rifle range as the last part of the "hunt" before ending up at a suitable establishment for drinks and food. Turned out that I already knew the range officer (a major in the TA).
So, after a safety briefing, we all got to lie down and fire 5 + 5 rounds at a fairly short range.
I'm a short-arse so they had to find an SLR with a shorter stock for me, they did find one, but that put me in the last group to fire.
During the briefing, the range officer said that if someone hadn't live fired before, a grouping within the width of your spread fingers was quite good.
Most people got near that, or thereabouts.
Clever clogs here, managed to get my two closest rounds within about 2" and all ten well within my small hand's width.
Range officer was impressed.
I wasn't, my shoulder was sore, despite really tucking the stock into place and my hearing, even with cans and plugs took a while to get back to normal.