If you don't like the brushes or flat-blade you can get a reamer-type like this:
https://i.postimg.cc/vBvTfj07/s-l1600.jpg
I got a LR and SR set for $30 shipped a while back off a guy on fleabay. He still has some SR ones. They're high speed steel, double-ended and adjustable for depth. For the price they're hard to beat. Sinclair International, Lyman, RCBS, Redding etc. run similar prices or more depending on design and material.
RE: item no. 223153363261
I made some handles for them since they're just the bit without a handle, but for bulk processing, I can still pull the bit and put them in a hand drill too.