"Less than aimed fire is very common in combat. It is very hard to replicate the effect of fear and adrenaline in anything other than combat. By far the most stressful time in my life was while under fire. Neither competition, qualification nor hunting can even come close to it."
STLRN is absolutely right. Practicing techniques which will not work in actual combat is futile and may well be fatal.
"I swear to defend the Constitution of the United States against all enemeis domestic or foreign WHOMSOEVER."