terrya,
If your measure is new make sure you disassemble it and give it a cleaning, mine was shipped with a lot of oil on the interior and it caused a problem dropping consistant charges, also after cleaning you may want to dust it with powdered graphite, or mica dust on the interior, just a good light dusting and blow off the excess. A powder baffle is offered, it helps metering of the problem powders, along with keeping the hopper near full.