Update
I used some pure lead and poured it into a spent .40 call casing that measured .403 I.D.
After it cooled I used a kinetic bullet puller to remove the slug. The finished slug measured .402
I then gave the barrel a good cleaning and after a light coat of oil I tapped the slug about halfway into the barrel then switched direction and taped it back out. The slug then measured .400 to .4005
My calipers show a small 5 after the .400 but not sure I trust them to be that close
Other changes
I purchased some new Starline 10mm brass from Wes
Purchased a Lee 4 die set that included the Factory Crimp Die
Loading the 220gr bullet in the new brass with the new dies on a lee 3 hole turret I did not have any of the wrinkles in the case I was getting at the bottom of the bullet and only 2 of the 150 I loaded did not pass the plunk test before the FCD. After I ran them through the FCD 100% passed.
I will see how they run this weekend. Also going to chronograph them to see if that changes at all
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