I'v found putting the powder and bullet in the tube together to be problematic. The powder tend to migrate around the bullet/sabot and can jam the bullet in the tube a little. Iuse the preloaded powder tubes for shooting at the range, but use a couple of Traditions "Pellet Loader" speed loaders for hunting - the ones with a cap on each end and a barrier between the powder and bullet.

For range shooting, it's really nice to have a few dozen premeasured charges ready to load, instead of measuring and dumping at the range. I like to lay out five tubes of powder, five bullets, and five primers at a time on the shooting table. It keeps things organized and prevents the dreaded dryball. If you get interrupted in the loading process you can see at a glance where you are in the process.