Engineers can generally make better shot than can be bought from vendors.
Crafted Solid Shot is usable starting level 30. That will be the best shot until you get to level 40 and can buy
Accurate Slugs from vendors. The next crafted shot becomes available at level 44 -
Mitrhil Gyr-shot You'll find some engineers making bullets to level their skill and willing to sell their goods for cheap.
Once you get to level 70, the ammunition available from revered reputation in various factions beats engineer crafted ammo.
Edited, Feb 5th 2008 9:56am by ItsaGaAs