The Cutter is large and has a bevel for tuning up on the case... This will get rid of the dreaded donuts that you hear Shooters complain about.
I think that is a misspelling (did I misspell mispelling? ) of the word "tuning" which should be "turning" up on the case. What they are talking about is you set the blade so that it turns some material off the shoulder/neck juncture and into the shoulder. That way when you shoot and the brass flows the donut will not develop. All turners are capable of doing this.
The only one that actually has a cutter on the end of the mandrel is the K & M.
quote:K & M has specially designed a new carbide mandrel that has four flutes for removing the "dough-nut" that is located at the neck-shoulder junction of a case. Removing this extra material aids in a consistent high volume flow of powder gas. A small difference in the shape and diameter of the hole makes a huge difference in performance. This new carbide mandrel will also cut the extra material out of this area if you have changed the neck to a different caliber. This mandrel works while you neck turn, so you will not have to perform a separate operation.
In my opinion the K & M is the ultimate turner and still much cheaper than the Kinnemans. I have a Forster and I sometimes wish I had gone with the K & M.
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