For you guys who are accurately shooting light rifles: how far? From what rest? Do you go 10/10 on a vital sized target?
Honestly the more I shoot the more I realize how difficult it is to be truly proficient at distance, let alone with a lightweight rifle.
I think your question should really just say rifles and remove the word "light." For me I practice way further than I hunt, and wind is a massive decision maker on how far I shoot at an animal. I practice out to about 1400 yards. While hunting I am extremely confident to 600 yards. The weight of a rifle to me doesn't matter regarding a miss. I have an exact range, and can reliably dial my elevation to exactly match that range. The rest and wind are what seem to matter. With a good rest a light or heavy rifle both hold the crosshairs on the target. Spotting impacts is much harder with a light rifle on improvised hasty rests IMO (turn your scope power down!). But the bullet still goes where I want it.
I have MOA steel targets hung all around and practice from tripods, off packs prone, extreme elevation, kneeling, etc..., off stumps, trees, pretty much anything I can drum up. Once a barrel passes the ~150 round mark and velocity and vertical spread have stabilized, misses are generally wind driven for me. If the crosshairs are not steady on target, I adjust/rebuild my position. While hunting, wind can reduce my 600 yard range, or extend it. The field rest I can setup can reduce it or extend it, etc...
There are lots better shooters than I, but the weight of a rifle has never been a factor for me regarding accuracy at any range. I've watched lots of guys drill a 600 or 800 MOA gong repeatedly with a factory Tikka. A 1" gun with quality ammo and a scope with reliable turrets are pretty deadly.
All of that said, my farthest shot to date is still a bull at 489 with factory Tikka T3 and a Burris 3-9 scope. Since then, I've built lots of long range hunting rifles for specific hunts and my longest elk taken with them is 351 and ~380. I'd like to be able to harvest the big one if I see him at 600 though, so practice for that occasion.