Drum lapping
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Drum lapping
After lapping the first drum to the measure, do you lap the second drum to the measure? Does it change the relationship of the first drum to the measure?
While I have two Auto Drum Measures, I'm wondering what is the best way to lap, if needed? Do I need to purchase a separate measure for each caliber that I load and lap a drum to the individual measure?
What do others do?
While I have two Auto Drum Measures, I'm wondering what is the best way to lap, if needed? Do I need to purchase a separate measure for each caliber that I load and lap a drum to the individual measure?
What do others do?
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Re: Drum lapping
Never had any problems with my AD that required lapping.
Now, my PPM was a different story. Lapping took care of
99% of the leakage problem.
Now, my PPM was a different story. Lapping took care of
99% of the leakage problem.
A day late & A dollar short? Story of my life
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Re: Drum lapping
I'm not sure. Lapping a drum to a powder measure chamber is "custom fitting" and another drum may not fit exactly.
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Re: Drum lapping
Thank you both for confirming my line of thinking. Glad that I have two Auto Drums and a Pro Auto Disk.
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Re: Drum lapping
I just used the kit on a Deluxe Perfect Powder Measure, it was simple I used some pasted from all the tubes except the 2 largest grit ones and worked down to an almost near factory mirrored finishes.Tim Stapp wrote:After lapping the first drum to the measure, do you lap the second drum to the measure? Does it change the relationship of the first drum to the measure?
While I have two Auto Drum Measures, I'm wondering what is the best way to lap, if needed? Do I need to purchase a separate measure for each caliber that I load and lap a drum to the individual measure?
What do others do?
https://www.aliexpress.com/item/3256802 ... 1802vqjaak
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Re: Drum lapping
Even though this is an older thread I have just started using a Lee Classic press with the Auto Drum powder drop. I did clean everything prior to use and had just a little leakage. Looking on youtube while this forum was down I watch a video by the fix it channel on chucking the drum onto a power drill and using fine sandpaper on a flat stick (paint stirrer ) gently sanding the drum. I did all of my drums and so far no leakage. All that's needed is to sand out the grooves to a smooth finish.
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Re: Drum lapping
Yup a very old &. established fix. Glad you found it.
A day late & A dollar short? Story of my life