1.2 seconds to react, raise rifle, hit at 25m on the A or C zone of an IPSC torso, on the timer, from Rhodesian Ready, safety engaged, finger outside of the trigger, rifle held horizontally across the thighs. Average of 5 tries. 1.5 seconds, same thing at 50m, 1.9 seconds, 100m. With the modified open rear sight, AR, and trigger job. Nothing to it. That's the point. Use the gear that makes it easy. and stick to that gear, unless given an overwhelming reason to switch to something else. The weak hside shoulder is still about 1/4 second slower (despite the ambi-safet) It's also more prone to the occasional D zone hit. at such speeds.
John — this reduced 12”x16” (12x20 if you count the head) silhouette target:
is the same size as the C zone of an IPSC target. You can see from the divots and chunks taken out at the edges that I use full-power ammo; it inevitably gets some damage when you shoot closer than 100 yards, which I often do.
On your sling setup, I have no idea why someone would sling their rifle so low as to be across their thighs when standing. I have long monkey arms (37” sleeve) and that’s way too low even for me. But that’s another topic.
This old video that I’ve posted before was at 102 feet (34 yards, or 36% further than your 25 yards); reacting to the buzzer, gun at low port (pointed at ground ~6-8 feet in front), safety on, finger outside the trigger. This was with an inexpensive Sparc red dot (back before the Sparc 2 even came out); not with open sights. But a red dot — with backup iron sights — is how my defensive long gun is set up, so that’s how I shoot it.
Thing is, even shooting substantially further away than your description, my slowest, cold-start time was still only 0.86 seconds. In fact, on my cold start my second hit is still only at 1.25 seconds total. My second (warmer) run was 0.78 and 0.39, for 1.17 seconds total. My third was 0.60 and 0.29, for 0.89 second total to react, bring up the gun, take off the safety, and hit the target twice.
And here’s the main thing to remember:
I’m not great, and make no claims at all of being great. The current standards are very different than they were in the 1970’s and 80’s, and nowadays even a guy who’s not great still can do two hits in less than a second; much less one shot in 1.2 seconds.
Ready? Here's the video. Nothing earth-shattering; it's something I've posted here years ago:
https://www.youtube.com/watch?v=XYuFt6Eh0BA