I cast some 309 diam. bullets using a LEE 170 gr bullet mold. Sized them to 309 diam. Powder coated, then re-sized to 309 again. Put on gas checks.
Prepped some 30-06 PPU brass . Started seating bullets into the PPU brass. Bullets just fell thru the neck into the case. Did this on 3 other attempts to seat bullets.
Switched to Winchester brass and the bullets seated perfectly. I'm guessing that the neck size is larger than the Winchester cases. Bagged up all of the PPU brass and set them way back in the brass pile.