I have 2 45 colt rifles I decided to shoot cast bullets in.
I ordered bullets from a number of commercial manufactures like Beartooth, Cast Performance and Missouri.
All the bullets I ordered were supposed to be .452 but they all measure out at .453.
It’s not my calipers as my jacketed bullets all measure out exactly as they are marked and the slugs in my slugging kit all measured as marked.
Do cast bullets tend to expand over time after being sized?