Powder Trickler
A reloading tool that dispenses powder a few kernels at a time so a charge can be brought up to an exact target weight.
A powder trickler is a small bench tool that releases smokeless powder one or several kernels at a time, usually through a rotating tube turned by a knob. Handloaders use it to top off a charge that a thrown measure left slightly light, adding granules until the reloading scale reads the exact target weight. This final, careful approach lets a load be held to a tenth of a grain or better.
The trickler matters most in precision reloading, where consistent powder weight from round to round helps keep velocity uniform. A typical workflow throws most of the charge with a powder measure, then tricklers the last fraction of a grain by hand. Automated dispensers combine the throwing and trickling steps, but the standalone trickler remains a simple, reliable way to fine-tune each charge.