I have been casting for four or five days. ( This year )
I cast a bunch of 41s but I didn't have a sizing die.
I ordered the Lee 410 die from Midway USA Friday.
It arrived at about noon:30 today.
It is too hot to cast comfortably this afternoon so I put that die in the press and ran about 20 bullets through it.
I opened up the catch container and pulled out one bullet.
I put my mike on it and you will not believe what it read!
.41000! That was a shock!
I turned it 90 degrees and tried again.
.41000 - What's up with that!
I turned it about 30 degrees and tried again.
.41005 ( Note that is half a tenth )
I turned it 30 degrees again and tried it again.
.40095 ( Yes I know the mike can't resolve that degree of accuracy but it displays it anyway. ).
I have never seen anything that close to the stated diameter OR that round in my life!
AND I don't expect to again.