Lyman accur-measure

I lucked into or lucked out of acquiring a Lyman accu-measure.
It came with the 3 rotors that give you 5 holes a #9s #9L #10s ,#10L and #12
I made one rotor but decided to use the 3 it came with and make them adjustable.
Well the #9 &#10 have the same diameter hole.

A 10x1.25mm end tap leaves enough meat left to form a reasonable thread in the #9 and #10 rotor.


No bolt or thread could be found so I cut a thread on the lathe using my special tooth metric gear.

Woo hoo.
The deepest hole in the #10L drops 6.5 grains bullseye.
Which is enough for all I need at present.
The others throw 4.5 -5 grains max which will do for my other smaller bulleye loads

I fancy my chances next time I’m in town for a few 10x1.25 short grub screws.

After a good clean out and graphite to get the works lubed up I filled ‘er up with bullseye and ran some tests.

I tried double tapping the handle both ways and was getting 0.5 grn max difference of 10 throws then weighing 49-48.5grns over many samples

Just tapping smartly to each end of throw of the lever to make sure all the powder is out of the nozzle, I was getting 0.3 gr max difference 48-47.7 grns over many samples.

Both are accurate with the single tap more consistent over many 10 throw weighting’s.
And yes they do throw different weights.
Happy as It is working
I can go forth now and load at will and increase or decrease my load on the fly at the range to tweak my loads.
I’m looking forward to using it.
Attachment 287946
I may need a little more time getting to know it but I think it should be good as gold.
What you reckon fellas?
Barra

Bloody goodonya, old mate.
Handy to have a lathe kicking around up in the shed, eh?

Baileyboats sells a rotor for the RCBS Little Dandy measure based on the same principle, but when I asked if he would be interested in doing what you did, he said he didn’t think there would be enough of a market. As Ausglock observed, “goodonya”. Maybe one day I’ll get a round tuit and make one myself. ;)

Froggie

The rotor I made with the 6mm tapped hole works well.
I have a grub screw with a couple of wraps of ptfe tape to make it firm and not rattle loose.
I set it for 1 grn and is very consistent and there is a lot of movement to turn the screw for a slight change in weight.
I say a fine 1/4" thread would do the same but it’s all to do with how deep a hole you can drill and how much have room to move.

Just putting the info out there.

I’ve bought a couple of duplicates and have a heavy round of scrap brass as well. Reading of your success is pushing me towards getting off my adze and making one myself. Nice work!

Froggie

Froggie, you sit on an adze! I hope its not too sharp!

No, my friend. It’s a fat, lazy adze! :bigsmyl2:
Froggie