Hooda Thunkit
Member
I have never used a Lee Auto Disc measure. I have used a Perfect Powder Measure, and an Auto Drum.
It seems to me that the Auto Drum is a modified, and (much) improved PPM. Modified to work on a turret/progressive press, and improved by changing the "drum" system on the PPM to allow changing it out.
The housing the drum rides in was also modified from the PPM.
I like the Auto Drum. It is fiddly to set up, and needs to be occasionally disassembled and cleaned, but when it is on, it is dead on.
The only problem I have with the AD is that to get the drum to cycle completely, it is sometimes necessary to bell the case mouth more than I like. I think that the problem is the heavy spring inside the housing; to overcome the spring force and cycle the drum, it can drive the bell into the case.
I have learned to 'walk the wire' on the flaring adjustments, sort of splitting the difference between the minimum flare, and complete cycling.
It works out well, once set up.
It seems to me that the Auto Drum is a modified, and (much) improved PPM. Modified to work on a turret/progressive press, and improved by changing the "drum" system on the PPM to allow changing it out.
The housing the drum rides in was also modified from the PPM.
I like the Auto Drum. It is fiddly to set up, and needs to be occasionally disassembled and cleaned, but when it is on, it is dead on.
The only problem I have with the AD is that to get the drum to cycle completely, it is sometimes necessary to bell the case mouth more than I like. I think that the problem is the heavy spring inside the housing; to overcome the spring force and cycle the drum, it can drive the bell into the case.
I have learned to 'walk the wire' on the flaring adjustments, sort of splitting the difference between the minimum flare, and complete cycling.
It works out well, once set up.