Luger Chambers VS Modern Chambers

[Doubs]

Originally Posted by DonVoigt

I"m not buying the "jump" business- unless you can point us to an authoritative source- comparing a bullet to a nail is . JMHO.

Seating a bullet to touch or enter the lands will raise pressure significantly higher than a bullet that is allowed to travel - jump, if you will - a short distance before contacting the lands.

OTOH, seating a bullet deeper into a case will reduce internal volume and also cause an increase in pressure.

Here is a link to an article written for Berger Bullets, one of the makers who cater to precision shooter. Read the article but pay attention to the text under figure 2 and the summary a little farther down.

https://bergerbullets.com/wp-content...13/03/COAL.pdf