You want to maintain the primary focus of the drill is proper sight alignment and sight picture; however, feel free to note some diagnostics the shooters can do regarding trigger control. As noted in the video below, some students may have a nice tight dot, indicating good trigger mechanics but many students will not have optimized trigger mechanics. The dash indicates movement of the muzzle when pressing the trigger (which is not good). Whether to coach deeper diagnostics or not is at your discretion.   How much do you want to coach them on a tangential yet important fundamental, but if a student has a reserve amount of attention and focus to accomplish "dots not dashes" every time they pull the trigger on the SIRT then reaffirm they should get clean dots and not dashes on the target.  Because there is more distance to the target the dashes will be longer and more pronounced.

Video of Sample Class Related to This Block

The sample videos below are to help you see how this instruction is actually taught. Now, this is not the only way to instruct, but it is shown to give you an example.