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20 practical case length

I have a Wilson trimmer that I leave set up just for 223 based cartridges, not having a pilot I can trim 20 Practical, 223 and 6x45mm with no adjustments.
 
One thing to do, no matter what round you're messing with, is to measure your chamber, write that figure down and refer to it often when reloading.
You'll find that the "measured chamber length" will be about .020 longer than the max trim to length. Save your self some trimming.;)
 
One thing to do, no matter what round you're messing with, is to measure your chamber, write that figure down and refer to it often when reloading.
You'll find that the "measured chamber length" will be about .020 longer than the max trim to length. Save your self some trimming.;)

And also, just maybe, avoid some residue build up.
 

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