Flash Hole uniformers K&M vs 21C pics

[Tesoro]

I have been using the k&m and ordered a 21C as was intrigued by the case neck bushing alignment system ( but not by the price). Anyhow the cutter heads looked very diff so I did a few samples of each then sliced the cases open for comparison. Here are the pics. The wide bevelled one is the 21C. Definitely eats up more of the web.

 

[Pdvdh]

I like the K&M better. Less is best when flash hole uniforming, in my opinion.

 

[Tesoro]

The k&m makes a cleaner cut too. the 21c cutters arent as even when looked at under a 20x loupe. It also is longer and has more wobble when run on a drill. not sure if this self corrects or not when cutting. could be one reason for the wider swath.

 

[243winxb]

Lyman 30-06

Both look better than mine, using a Lyman tool.

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[Garycrow]

I've been using the K&M tool for years, can't see any reason to change.