In the "
usual" charge-weight range (33.8-34.8Gr.), as displayed on match report equipment-lists, H-4198, with bullets of up to 125 Gr., and barrels between 21 & 24" long, usually produces about 3020-3050fps. The much denser H-322 - at [Jones] mearure setting which throws H-4198/34.8Gr. - weighs in at 37.2Gr weight, but produces about 100fps less velocity: precision is usually equal. DITTO BenchMark. As pointed out by Dave Berg, these charges will result in almost level-full case fill: the charge will be
compatced.
The (ADI manufactured) H-4227 worked quite well, the down-side for many people seemed to be that there was always room for more . . . & they could not resist tipping the can, so, first, the groups "blew-up", followed by pressure wrecking their brass! IMR4227 should work well also, as could N-120, which, early on, also I tried, but in the Ronnie Long smithed Morrison barrel, did not deliver
consistency. In that barrel, though, via H-4227, MUCH HIGHER velocity was possible, the precision window was 2950fps, +/- a little: the charge-weight was 29.5gr . . . nicley serendipitous.
There are a number of other powders which, in early testing, "worked" well (produced precision grouping) - just not as well as the H-4198 & those listed above. A brief list, some of which, even in good times, are unavailable: RL-7; Tu2000 (great if you can find it); Lt-30; N-130.
Though developed specifically for the 30BR capacity & expansion ratio, the Lt30 which came in the original (initial production LOT) jugs, was not the stuff, based upon the prototyping DATA, which we expected.

The bulk-density did/does not accommodate the charge-weights, thus, velocity which we were shown. We were (I was) expecting a bulk-density equal to H-322, featuring the H-4198 burn-rate - my Lt-30, is slightly less dense than my H-4198 - performance (precision) is about equal.
Precision should always trump velocity.
Keep 'em ON the X! RG
P.S. I have not chronographed a 30BR barrel for many years - the last time I did, was to compare LV (21") & HV (24") barrels, using the same components - for a pair of ten-shot strings, the Oehler displayed an average difference of 21FPS, or, 7FPS per inch. That was not a cut-off test - there could be that much difference between two barrels of equal length, from the same manufacturer.