For your entertainment...
...I went out this afternoon and did some informal tests. Shot just 2 or 3 5-shot groups before commencing with the tests.
7-yd Bill drills fired at standard IDPA target using Pocket Pro' timer set at random start (no gaming the buzzer).
First, my CZ-75B (9mm) using Blade-Tech holster I compete with. Wearing hooded sweat shirt but pulled out of the way to allow for non-concealed draw (not as optimal as tucked in shirt as with classifier, but it was too chilly to take it off...so I have a cold...sue me
). All strings start cocked and locked.
String 1 - Bill Drill
Draw - 1.76
shot 2 - 4.24 (had to TRB)
shot 3 - 4.51
shot 4 - 4.77
shot 5 - 5.00
shot 6 - 5.22
TPD - 2
String 2 - Bill Drill
Draw - 1.90
shot 2 - 2.14
shot 3 - 2.36
shot 4 - 2.56
shot 5 - 2.77
shot 6 - 2.96
TPD - 15 (rushed big time...high and right)
String 3 - Bill Drill
Draw - 1.93
shot 2 - 2.16
shot 3 - 2.43
shot 4 - 2.68
shot 5 - 2.90
shot 6 - 3.13
TPD - 2
Next, my Bulgarian Makarov (9x18) with Fobus Paddle (my grab and go carry set-up). Hooded sweatshirt is pulled over the Fobus to completely conceal it. Mak' is started loaded but decocked making all Draw shots double-action.
String 1 - Control String where Mak' sweatshirt is pulled away equivalent to CZ-75B...Strings 2-4 will be concealed.
Draw - 1.76
shot 2 - 2.26
shot 3 - 2.47
shot 4 - 2.69
shot 5 - 2.87
shot 6 - 3.07
TPD - 5 (DA shot was low...others drifted high)
String 2 - Concealed
Draw - 2.72
shot 2 - 3.25
shot 3 - 3.48
shot 4 - 3.66
shot 5 - 3.88
shot 6 - 4.07
TPD - 3 (decent grouping but drifted high)
String 3 - Concealed
Draw - 2.48
shot 2 - 3.19
shot 3 - 3.38
shot 4 - 3.59
shot 5 - 3.78
shot 6 - 4.00
TPD - 9 (decent grouping but drifted high - had a Mike that went over the other five)
String 4 - Concealed
Draw - 2.41
shot 2 - 2.71
shot 3 - 2.96
shot 4 - 3.17
shot 5 - 3.39
shot 6 - 3.60
TPD - 7 (didn't group quite as well...2 drifted right...suspecting Draw+shot 2)
Conclusions/lessons learned
1) Condition of readiness of a piece very much influences ability to get off a rapid response. The DA/SA transition with the Mak' adds some time.
2) Concealment garments make a difference in ability to get off a rapid response (I find that my 5.11 vest adds about .2 to draw times...practical carry using a light jacket is about the same). Clearing the sweatshirt definitely added time.
3) As dusk resulted in dwindling light, the bladed sight on the Makarov didn't show nearly as well as the outlined Trijicons on the CZ-75B.
4) As always there is a speed/accuracy trade-off that has to be considered
Bottom line, depending on the specifics of your "carry kit", competition capability response times may not 100% translate (and that's before the emotional/physical reaction to being under real stress vs. simulated).
Stay safe,
CZ52'