I will say that almost the exact opening burst rotation that you said,
Sab Charge -> Aimed Shot -> Wounding Shots
which takes (1.5+2.5+3 = 7 seconds) can be replaced with the SS rotation
Sab Charge -> Instant Charged Burst (with Smuggler's Luck) -> Aimed Shot (1.5 sec induction) -> Trickshot
This rotation will take less time (1.5+1.5+1.5+1.5 = 6 seconds)....
I think you we're responding to me.
You are correct, your rotation takes less time overall, BUT...my rotation front-loads that extra second BEFORE the target is damaged. To the person you are targeting, they have no idea that the Explosive Probe is on them and won't know until your first shot hits and activates it. The first shot will be my Ambush, which is where the extra second comes from since I don't get time reduction bonus. However, at the moment the target takes damage, every attack follows through as fast as the GCDs can cycle. So from the target's perspective, they lose that 1.5 seconds of reaction time after realizing that they are taking damage, which is huge.
In a straight 1v1 fight, which is an engagement a MM Sniper should try hard to avoid, I agree that your rotation is more optimal and I do use an altered variation of it (Probe>Snapshot Snipe>Followthrough>Ambush>Snapshot Snipe>Followthrough). But in a multi-player scrum, where you have a melee tanking/DPSing for you while you are at max range, by the time the target has time to say, "Oh Shizzle!!!"...they are in the respawn zone.