Does anyone know?

[DeanoBeanCounter]

Does anyone know the size of the slots in these brass sorters?

https://www.amazon.com/Shell-Sorter-380ACP-3pc-set/dp/B00BFN5TTI/ref=sr_1_1?s=sporting-goods&ie=UTF8&qid=1514323012&sr=1-1&keywords=shell+sorter+brass+sorter

They are cheeper other places I know but I don't see why you could make your own.

[acoop101]

I have borrowed a set and will let you know tomorrow when. I get a chance to measure them.

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[mold maker]

There is also an additional metal disc cut to separate 9mm from the smaller sizes. If you are dealing with enough brass, they are worth the money.
The first 5 gals of brass you use them on will make ya say Eurica !!!!!!
There will still be an occasional nested piece that slips by, but the time savings is worth the price.