My rcbs uniflow is not sensitive to hopper fill levels with the metal baffle installed.
I don’t know if Lee offers these.
I have several of those Lee POS throwers, one set for each load, if you slick them up a little and set the tension correctly, they throw extruded powder very consistently.
Some years back while trying to figure out a powder baffle I discovered that the plastic caps off the 1 pounders fit perfectly like they were made for it, just drilled three 1/4 " holes evenly spread in a triangle pattern and push gently into the bottom of the hopper in a "cup" fashion, with the cap liner removed of course. I think they do help, my buddy now has 3D printer and made me one to test drive that I've only used once so far but I think it was an improvement over the cap. I do think however, these thrower's work best on the full side.
I have read how accurate the lee dispenser is. Bought one, it was all over the map. Ran about 3 pounds of powder thru it and it never got any better. Thankfully i could send it back, which is what I didNever owned the Lee.
Have a Belding&Mull that is a heck of a measure. IMR4198, H1000 is amazing how close it drops. Most would think I was blowing smoke.
I have read how accurate the lee dispenser is. Bought one, it was all over the map. Ran about 3 pounds of powder thru it and it never got any better. Thankfully i could send it back, which is what I did