'Never need to trim brass' dies from RCBS ..?

[AJMD429]

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Anyone use their 'X-dies'...?

https://www.youtube.com/watch?v=A78lutJP5_g

If so, are their claims true...?

[Scott Tschirhart]

Interesting, but o don’t know.

[COSteve]

I never need to separately trim my brass because I have a Dillon trimmer with a trim die on all my rifle case prep toolheads. I have the lock ring set to the correct position so all I have to do is screw on the trimmer and go. When it's through processing, I dump it in my Harbor Freight tumblers for 15 minutes to remove the lube and then dump it in the appropriate keg ready to handload.

So, I dump my lubed brass into the casefeeder and start cranking and my brass comes out resized, decapped, trimmed (only if necessary) and cleaned all without me ever touching a single piece of brass. The Dillon trimmer produces a very clean smooth case mouth edge with a slight bevel. Any 'fuzz' on it is removed when tumbled to remove the lube. I don't chamfer the inside case mouth as I found that it doesn't increase accuracy or ease of bullet seating.

BTW, I checked with all the precision ammo makers like Federal Match, Hornady, Nosler, Winchester, Remington, etc. and none of them chamfer the inside case mouth.

[ywaltzucanrknrl]

These were popular with some of the Across the Course shooters when I was shooting. They load mainly 5.56. They said their brass life was about the same, and they did work as advertised. I never used them and kind of always questioned how they were effecting the brass. I guess mainly what I thought was that if the brass was not getting longer, was it getting fatter in the neck? Or?