I'm sort of surprised than no one really showed any interest in this topic. I've been using Scout of Action for daily warmup since making this post. Man, can you see a difference in your aim after 20 minutes. I'm replying to see if maybe there IS some interest.
Here are two helpful, if perhaps obvious tips: 1) count your bullets and always reload after 19 to maximize magazine efficiency. That is very obvious. 2) perhaps less obvious is to try, whenever possible, to use the reload time to center your reticle on one of the back targets if any are blue, and to plan the next several shots. It kind of bugs me how much depends on RNG in this activity, but there is no way around it. If you get really bad luck it's usually better to just leave the play area and restart.
So far my high score is 74 (I'm a fairly mediocre player) and I can consistently get to there by the middle of each session. My first round of the day is usually around 57-60. What's your high score? I'm aiming to get to 90 and be happy with that. A great score for a controller player is somewhere around 110 in my opinion. I think that's been beat, but not by much. I'm not interested to compare my score with MnK players, who obviously have a huge advantage over controller in this particular exercise. But I'd love to hear about your excellent score, regardless.
Tangentially, I have found that the amount of bleed-over from other people sharing your firing range has gotten insufferable. Frag grenades, Seer abilites, Valk's rockets, Wattson gens breaking, even Bang smoke once. You name it - if it's loud or causes screen shake, it's constantly distracting me and has ruined several good attempts. I don't remember this amount of bleed-through in the past, it was just holo sprays, ziplines moving and the occasional explosion. I've had to reload into firing range more than once in a session to get one that is relatively calm.