What is the difference between leade and freebore?
Up until today I thought they were the same thing until I read about the difference in dimensions.
My understanding is leade is where the bullet sits just barely touching the rifleing. 5.56 has a longer leade than .223 because it uses heavier bullets and loaded to higher pressure with the bullet being set forward in the case more. Freebore is where the bullet jumps between them with virtually no resistance.
According to Hornady, leade and freebore are the same. Reference below.
Always understood myself that they were two terms that meant the same thing.
I thought leade was the dimension from the end of the chamber to where the rifling lands are at their full dimension, freebore is the measurement a bullet jumps to engauge the rifling. Not the same dimensions as the freebore will be shorter due to the ogive of the bullet sticking out farther than the end of the case mouth.