BLC-2 was a popular powder years ago...look at loading manuals, and it has good velocity and can be used in a very wide range of cartridges.
I didn't use it much over the years...don't remember why....maybe something else was more accurate at the time, in my rifles. I like ball powders and have used them alot, temperature sensitivity never bothered me, for what I used them for even in the hot desert in mid summer. Ball Powder is sometimes surprising, the smallest 5 shot group I ever shot off the bench many years ago was a 222 Rem 25.8 gr Win 748 ball @ $34 for 8 lbs and expensive Sierra 52 gr match $5.89 per hundred ...all through the same hole ... with a factory heavy varmint Rem 700... looked like a record...but I was the only one at the range that day and it wasn't in competition.
I Use ball powder, 748, loaded on a Dillion to achieve 1085 rds per minute, just like the military.
With military brass & primers, and ball powders loaded on progressives and cheap bullets will shoot 5 shot groups in .2" to .6" with surprising regularity...no need to weigh anything. A recent surprise is old H380 ball, very consistent velocities, loaded in a progressive 10 shot S/D 5.5 fps with 168 match, and military cases and primers using a case activated powder measure in the Dillion...the 147 FMJ were checked with a S/D of 3.6 fps for 5 shots. Loaded as fast as you can stuff bullets and pull the handle...ball powders serve a definite purpose, and I especially like the new Staball line...Ball powders are used almost exclusively in a lot of my calibers, and a mix in most others ...even my 6 Dasher gets a dose of ball powder if I want more speed, but still retain nice reasonable accuracy, same for the 50BMG, nothing like 265 grs of Ball powder behind your bullet to get it motivated. Stick powder is like James Bond, polite & refined, ...Ball Powder is like Rambo, "somewhat" less refined, ... agressively breaking down barriers, nothin fancy, just getin it done. In the 6mm ARC accuracy and velocity...ball powder all the way.
And sometimes just what I need, and consume it by the 8 lb keg, all my last group of powder buys have been, ball...