Nonetheless, you've only got to look at the number of experienced stalkers who have to retake the shooting test to realise that, under pressure, it can be challenging.A 4 inch group at 100 meters is not good at all! The standard for dsc should be higher than that.
Most people blame their kit, of course. ("I think I knocked my scope this morning"

(And before anyone asks, yes, I did pass all sections at the first attempt. And I acknowledge that I'm a pretty poor shot. So there's clearly other factors at play that make people screw up).