I have never used LT30 or LT32.
Most of my most accurate .223 light bullet data, 55gs and under, is with N133. I did try H335 but N133 performed better.
I got slightly better accuracy from the Flat base 53 gr SMKs #1400, and 52 gr Berger FB #22408 rather than the 52 gr SMKs #1410.
I actually got my best accuracy using 52 gr Hornady ELD-M #22491.
The 52 gr ELD-Ms performed slightly better than the Hornady 53 gr Match #2250 and 53 gr Hornady V-Max #22265.
Most of that data came from my Savage 12FV 1:9 twist 26-inch factory barrel that was replaced after 9,030 rounds.
I have concentrated most of my use of the new Shilen 1:7 twist barrel on that rifle with bullets 69 grs to 90 grs.
I guess I ought to at least try some light bullets just to see how then might do, but the chamber is so deep, the jumps would be enormous.