Luger Chambers VS Modern Chambers

[DonVoigt]

Doubs,
thanks for the reference.

The text you mention, from the article:
Seating a bullet against the rifling causes pressures to be elevated
noticeably higher than if the bullet were seated just a few thousandths
of an inch off the rifling.
A very common practice in precision reloading is to establish the COAL
for a bullet that’s seated to touch the rifling. This is a reference length
that the handloader works from when searching for the optimal seating
depth for precision. Many times the best seating depth is with the bullet
touching or very near the rifling. However in some rifles, the best
seating depth might be 0.100” or more off the rifling. This is simply a
variable the handloader uses to tune the precision of a rifle.

From the entire article, two things "stand out":

1-"Seating a bullet against the rifling causes pressures to be elevated
noticeably higher than if the bullet were seated just a few thousandths
of an inch off the rifling."
Noticeable is an interesting word, but means little without some numeric qualification; noticeable = observable or measurable to me- not necessarily dangerous.

2- In the long discussion of seating bullets for accuracy, including touching the rifling, Nowhere does the article say the noticable pressure increase is "significant" or
" dangerous".
A bullet seated out farther also increases internal volume- which reduces chamber pressure for a given charge.



I'm sure we can all interpret the things we read in different ways, but flatly stating that a bullet must "jump" or it will cause dangerous pressures is just not correct. JMHO.