Don't know about logic but:
If sizing the bullets after coating them scraps the coating off then why doesn't shooting them (another form of sizing) scrap the coating off???
It depends when I size them. I don't like to size my cast bullets more than 3/1000th's smaller at any time. Coating adds 2/1000th's to the diameter of a bullet.
so for example:
I want some 30cal bullets for the 308w and I typically size them to .310". 1 mold casts a .311" bullet and the coating adds 2/1000th's to the diameter of that bullet. The end result is a .313" bullet. I will size them after I cast/coat them. Another mold casts a .313" bullet. The coating adds another 2/1000th's to the bullet. The cast coated bullet is .315" after casting/coating them. I will size the .313" bullets down to .310", then coat the bullet and re-size them to .310" again.
Sizing down more then 3/1000th's at 1 time tends to be hard on the bullet bases/gas checks/etc. Anything under pressure tends to go to the least point of resistance.
The only time I've ever seen the coating scrap off a coated bullet is when the cases weren't properly expanded/flared.
I on the cheap side myself. Coated bullets are easy/cheap to do. The firearms stay clean longer and use less solvents/patches/brushes to clean. Coating bullets also take alloys out of play. Free range scrap is a beautiful thing when it's turned into piles of bullets that can be used from lite 38spl target loads to 30,000+psi magnum loads to 30,000psi rifle loads.
Last edited by Forrest r; 05-11-2018 at 06:28 PM.
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