45 cal sizer die What size?

[BKtul]

I need to size for my Pro Tac II, Dan Wesson Heritage and G 21. They slug at .4499 and .4500. Should I get the .451 sizer? I have a Lyman 4500 w/heater. I'm using Uniquesky. It's working good in my G19C 9mm.
I don't know if a .450 is available. Midway doesn't show one that I noticed.

 

[Randall]

.451 or .452 should work,as long as the bullet is a little larger than groove size in an auto.A revolver bullet should be the same size or larger than the cylinder throats which should be larger than the groove size

 

[Roadking Larry]

for .45 ACP size them to .452.