If you're just starting out, don't use Lil'gun, 296, or H110. Save those for later when you know what you are doing and know what to expect. There are plenty of other good powders than will get you to almost the same power levels without the dangers of undercharging or poor ignition etc. 2400 is a good one. I really like Herco with heavy cast bullets, but you don't hear much about that one anymore. Power Pistol should be good but I haven't gotten around to trying it (there's an unopened pound on my powder shelf.) Blue Dot can be very good if you find a load your gun likes, but there are as many bad loads as good for some reason, so put that one in your "try it later" list too. Red Dot is excellent for low power loads with lead bullets and might be good for your 1000 fps load. It gets unpleasant if you load it too high.