I haven't used the LT30, though have used the LT32 since they came out with it and have burned many jugs in my .223 Rem Rifles. All of the loads I use it with are for 35-50 grain varmint bullets, though will do just as well with similar-weight target bullets like the 52's. In a half-dozen different rifles that I use it in, whether in 1-8, 1-9 or 1-12 twist barrels, this powder seems to really like bullets in the 35 to 52- grain range. Online load data is available from the manufacturer. Here are a few of my pet loads. Work up and use the manual if unsure.
Berger 52 grain, Lake City brass, 22.1 to 22.6 grns. LT32, Rem 7 1/2 primer
Hornady 40 V-Max, Lake City brass, 23.8 grns. LT32, Rem 7 1/2 primer
Hornady 50 V-Max, Remington brass, 22.1 to 22.5 grns. LT32, Rem 7 1/2 primers
Have used Lake City brass with this load and got about 15 fps less velocity - equally accurate.
40 grain lead-free ballistic tip, 23.2 LT32, Lake City brass, 7 1/2
The load that will shoot good in all my rifles (in varying degree from good to fantastic) is the 50-grain V-Max load above. The target load is very similar for 52 Bergers, Sierra MK or Nosler CC's.
All the above loads will shoot, in each dialed in rifle, groups of 3/8" or so - some down to 1/4" +/-, with the target bullets getting very small.
I think you will really like that powder if wanting to shoot these bullet weights. I never experimented much on heavier bullets with that powder - so can't really say much there. I'd probably use a different powder if over 55 grains.
I have used Lapua and Winchester brass a lot with these loads, as well as various primers like CCI450 and Federal A/R Match (as I use these loads a lot in A/R's as well). Just work up.