That looks like a solid setup to me. 600y isn't thaaat far for a carbine especially on a fullsize ipsc, should be plenty doable with good ammo and a stable shooting position. Knowing your dope will be a big help. I know you know this. And that's a great weight for the carbine. I coyote hunt with a 16" 6.8PSC with a 3-9x Accupoint and a Form1 titanium suppressor that is 7lbs 11oz, much better than the 12lbs I was hauling around with a heavier barrel, heavier suppressor (SDN6), and heavier optic.
I'm not sure what the course of fires will look like but I find a biathlon type sling is much easier to haul a rifle with, distributes the weight more evenly on my shoulders. I've never done a run n' gun type match but during our coyote contests we can walk up to 15 miles in day and every once counts by the time it's over. Start out the day with a pack, chair, electronic call, shooting sticks, etc etc. Sometimes by the end of the day I'm using a mouth call and sitting on my ass with just my shooting sticks lol.
If you're really serious, maybe could get a Titanium Forward Assist and Titanium muzzle brake, and swap the handguard to a BCM KMR (old magnesium one if you can find it) with titanium barrel nut, and hell maybe even a titanium BCG and low mass operating system. There's definitely a point of diminishing returns when chasing lightweight build though (cost vs weight).