The ones I own work very well--
I have five of them, installed in five different measures. Titegroup is in one of the measures, and it is metered very reliably. My first guess is that you had the hopper screwed down too tight, but there could be other minor problems.
Try doing this:
1. Disassemble your measure, and put the powder back into its original container.
2. Now clean everything: the Lee reservoir, the powder measure base, the adjustable charge bar, the drop tube, the linkage. I use the proverbial 'gun scrubber' / brake fluid type of product.
Pay particular attention to cleaning the surfaces at the bottom of the reservioir and the top of the charge bar. If there are any rough spots, take them off with a fine grit paper on a flat backer. If your measure is the latest version, inspect the wiper / seal to see that it is not damaged. (New ones are available from Lee)
3. Inspect the actuating linkage and when you reassemble it, put a drop of oil on the mounting pin. (No oil elsewhere.)
4. Now reassemble, and pay close attention to the installation instructions: You have to get the actuator lever into the correct slot on the underside of the charge bar.
5. As you install the hopper, tighten the screws 'a bit'--not blindly just tightening them 'good and tight.'
6. Without powder in the measure, install it on your press and try indexing it with cases to test the measure operation. If the bar binds, loosen the screws slightly; if the hopper is loose, tighten it slightly--etc., etc.
7. Now add the powder and test it again. Tweak the hopper mounting screw tightness as needed. My measures have no leakage to speak of--although AA#7 can leak a bit. Titegroup just shows the odd kernel escaping. All of them, however, have had the very rare occasion of a granule getting between the hopper and the bar, with possible binding, so always watch the actuator when you dump the powder and confirm the bar moved properly.
And--as a following post reminds me--the bar does not work reliably below about 3 gr, AFAICT.Jim H.
