Hi there,
I posted here a few days ago looking for feedback on those that have modified a Lee Auto Disk to use three disks I did a few tests today with one .308 case dropping charges of Reloader 15 with the new set up.
The setup...
- Used two 6-32 x 2 screws. These work, but could be a little longer.
- I used a razor blade to cut the tabs off of one side of two spacers.
Price for everything:
Auto Disk Pro Measure = $35
Rifle Charging Die = $10
Lee Double Disk Kit = $10
Lee Double Disk Kit = $10
Lee "C" style press = $25
Previously, I owned a perfect powder measure and found that adding a baffle and sometimes weighting the powder with carriage washers could positively impact accuracy. I like the Auto Disk on my turret press, but found that the round hopper allowed to powder to compact. Going to original square hopper with the baffle and using the adjustable charge bar (so, I don't wear out the threads) fixed that problem.
Those tricks didn't seem to work this time, which surprised me. Especially adding a baffle.
Maybe it's because the measure was mounted to a "C" frame press and not rotating?
Example throw using a 1.09 cc + 1.09 cc + 1.18 cc = 3.36 cc
47.6
47.3
47.4
47.3
47.5
47.7
47.3
47.0
47.2
47.5
Extreme spread was .7 grains, really about the same as my Perfect Powder Measure. I was also looking to throw 46.0 grains of Reloader 15, so this was a little high.
Maybe the additional disk was causing extra error? So, I went to the double disk kit and tried 1.57 cc + 1.57 cc...
44.5
44.8
44.5
44.3
44.7
44.6
44.5
44.6
44.3
44.5
Extreme spread was a little better at .5 grains. Still not much better than the triple disk really.
The next result makes sense, but I wasn't expecting it. I tried 1.09 cc + 1.09 cc + 1.09 cc = 3.27 cc.
46.0
46.0
45.9
46.1
46.3
46.0
46.0
45.8
46.4
46.0
Extreme spread was .6 cc, but it appears to be a little more consistent using the same three disks. A little powder did leak around the disks, which could have resulted in some of the low charges. Next time I might use a screw driver to tighten the screws a little more.
You can still set it low and trickle up. I just use an old spent case to hold the powder, but generally, it will be used for automatic dispensing.
A rotary measure allows for an infinite adjustment, however, I find the Auto Disk has an easy setup and doesn't require and combination of knocks, taps or shakes.
I'll post a few pics when I get a chance. Hope this helps someone out!
I posted here a few days ago looking for feedback on those that have modified a Lee Auto Disk to use three disks I did a few tests today with one .308 case dropping charges of Reloader 15 with the new set up.
The setup...
- Used two 6-32 x 2 screws. These work, but could be a little longer.
- I used a razor blade to cut the tabs off of one side of two spacers.
Price for everything:
Auto Disk Pro Measure = $35
Rifle Charging Die = $10
Lee Double Disk Kit = $10
Lee Double Disk Kit = $10
Lee "C" style press = $25
Previously, I owned a perfect powder measure and found that adding a baffle and sometimes weighting the powder with carriage washers could positively impact accuracy. I like the Auto Disk on my turret press, but found that the round hopper allowed to powder to compact. Going to original square hopper with the baffle and using the adjustable charge bar (so, I don't wear out the threads) fixed that problem.
Those tricks didn't seem to work this time, which surprised me. Especially adding a baffle.
Maybe it's because the measure was mounted to a "C" frame press and not rotating?
Example throw using a 1.09 cc + 1.09 cc + 1.18 cc = 3.36 cc
47.6
47.3
47.4
47.3
47.5
47.7
47.3
47.0
47.2
47.5
Extreme spread was .7 grains, really about the same as my Perfect Powder Measure. I was also looking to throw 46.0 grains of Reloader 15, so this was a little high.
Maybe the additional disk was causing extra error? So, I went to the double disk kit and tried 1.57 cc + 1.57 cc...
44.5
44.8
44.5
44.3
44.7
44.6
44.5
44.6
44.3
44.5
Extreme spread was a little better at .5 grains. Still not much better than the triple disk really.
The next result makes sense, but I wasn't expecting it. I tried 1.09 cc + 1.09 cc + 1.09 cc = 3.27 cc.
46.0
46.0
45.9
46.1
46.3
46.0
46.0
45.8
46.4
46.0
Extreme spread was .6 cc, but it appears to be a little more consistent using the same three disks. A little powder did leak around the disks, which could have resulted in some of the low charges. Next time I might use a screw driver to tighten the screws a little more.
You can still set it low and trickle up. I just use an old spent case to hold the powder, but generally, it will be used for automatic dispensing.
A rotary measure allows for an infinite adjustment, however, I find the Auto Disk has an easy setup and doesn't require and combination of knocks, taps or shakes.
I'll post a few pics when I get a chance. Hope this helps someone out!
Last edited: