I keep hearing good things about Lil Gun. Just haven't seen the need to go away from the old standby yet (Where'd I put that 8lb jug of 2400?
).
H-110 / 296 is definitely a classic with magnum loads. It gets slightly better speeds on the top end vs. 2400, but it's got a really narrow operating window. Most start load data is only a grain away from max data. Having been through load development with a few picky rifles, I'll give up 50 fps on the top end to have a wider range to work with.