I recently slugged the barrel of two Kimber 45 ACP's. I used cerrosafe alloy and followed the directions posted on Midway. Both slugs were removed within 15 minutes after pouring. After 1 hour they measured .454. It seems that .452 is a more common measurement.
I found another reference to heating the barrel prior to pouring. It seems that could produce different results.
What is the best practice?
I found another reference to heating the barrel prior to pouring. It seems that could produce different results.
What is the best practice?