To me "dumping an entire mag" is silly....its a "pray and spray" mentality. Its not practice ..its just pushing lead downrange..
But drawing - and shooting quickly - against some standard under the stress of a timer - and "tactically accurate" --- is a skill that shooters, that want to practrice defensive shooting need to consider.
I'm not sure I understood the description of their target...but a lot of professional instructors talk about "tactical accuracy" --- and while there is no single standard...a couple of things seem to keep coming up in terms of what the primary target is. Head area - small triangle or rectangle "eyes to bottom of nasal cavity" / a Groin Area - a rectangle accross the belt line and down toward the pelvis between the legs / a Center Chest area - most focus on a rectangle "nipple to nipple and down toward belly button - about 8 1/2" wide and 10 or 11 inches long...
In the Center Chest area ...there is a 3" by 5" area...in some silhouette targets that would be your ideal target --- but if you use the roughly 8 1/2" by 11" rectangle -- aby shot in that rectangle...is Tactically just as accurate as a shot in the 3" X 5" area. Any shot in that rectangle will disable an attacker..spine, main organs...
Bulls Eye shooting...I'd want to be tapping that 3" X 5" area 99% of the time. But if I'm practicing for Defense...that center chest rectangle makes a meaningful target to me. While I shoot some drills that call for Head or Groin shots as well...90% of my practice is to center chest area.
Depending on your ability ( age, eyes, etc...)...for an average shooter you might set a standard to hit that center target ( hands at side - draw and fire 4 rounds inside of 3.5 sec )..../ A Master class level shooter might set a standard for that at 1.6 sec...../ and a Beginner might set the standard at 5.4 sec.... with a breakdown of times like this :
Draw to 1 shot ( Master 1.0 sec / B class 2.0 sec / Beginner 3.0 sec
Split times to each shot after ( Master 0.2 sec / B class 0.5 sec / Beginner 0.8 sec )....
But the point is ...draw safely ( from concealment garmet ideally ) -- and place effective "Tactical Shots" on target...at some standard.
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Reload drills are a part of these drills too ...a B class shooter should be able to execute a speed reload ( gun goes to slide lock - drop mag - grab mag off your belt - insert - and fire 1 shot on target in under 3.0 sec / Master 1.5 sec / Beginner 4.5 sec....
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Personally, I practice drills like this every week..usually twice a week ( 3 or 4 boxes per range session )... to stay sharp ...for Defense.
Is that what you saw them doing...I don't know ...doesn't sound like it. But I think these kinds of drills have a lot of value/and they're fun --- and I know its a priveledge, as a membership range in my area, allows us to shoot like this every week.
The ICE-QT targer....outlines these areas pretty well in m view.
https://www.google.com/search?q=ice...=ZG_sVqnpIpe2jwOw6JqYCg#imgrc=YyX8pyA5jK4yFM:
When my buddies and I train ...we ignore the 3" by 5" area right by the fist / the next outline is the primary target .../ the next outline is a miss / and unless we are shooting "head shots"...a shot to the Face or Head area is a miss.
We primarily practice between 5 and 10 yds.../ personally I expect my scores to be consistently about 95% of a class B level ( and I'm in my late 60's -- bad eyes, some arthritis )....and often I'm happy to be in between level B (3.5 sec ) - and Master class( 1.6 Sec) . Some days I can run Draw and Fire 4 at a AA class level 2.2 sec...and some days I can't / A class is at 2.9 sec ( and class B 3.5 sec )..../ I want to be at least 90% hits on target and under the time standard for Class A...and I feel good about carrying on the street.
If I can't shoot my drills at a 90% level of Class A...then I need to practice more / more dry fire, more focus, stance, grip, etc..