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Old July 3, 2022, 10:47 AM   #7
Jim Watson
Senior Member
 
Join Date: October 25, 2001
Location: Alabama
Posts: 17,847
The only neckdown I have done was .45-70 to .33 WCF and .40-65. No problems if done in easy stages. I would hope .30 to 7mm no worse.

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Quote:
I once accidentally ran a 45 Auto case into a 44 Special/Mag carbide sizing die. I didn't even notice by the feel that I had done this, so it was quite a surprise when I lowered the ram to see my new wildcat case sitting in the shell holder.
There was once some interest in cheap .44 plinkers made this way.
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