Actually, for comparable loads/pressures you usually use more powder the lighter the bullet. For the same powder, a 185gr normally requires more powder than a 200, which uses more than a 230 gr. The least amount of powder is with a 230 gr. The greater mass of the heavier bullet makes the pressures build faster and so needs less powder.
If you try TiteGroup in lighter loads, you may find it dirty (it created more fouling than any other powder I've tried, including W231, Unique, Bullseye, Red Dot, and Clays) in such loads. See what you think. It is very clean in regular to full power loads. For lighter loads, try Hodgdon Clays, which is much used in the bullseye community, usually 3.6-3.8 grains behind a 200 gr. LSWC.