[Rimfire5]

The Berger manual makes it clear that their stated seating depths are not recommendations for best performance.
In fact, they say that reloaders need to experiment to find what works best for their rifles.

In my 6.5mm CM rifles I have spent a lot of rounds finding out what works best for the three different 140 grain Bergers - Match, Hybrid, and Long Range.

When I found the right seating depth (jump) for each bullet, the accuracy for each bullet improved a lot.

With some of my well-used rifles, the lighter bullets, up to 52 & 53 grains, fall out of the necks before they touch the lands of my well-used barrels. So my seating depths have to be based upon leaving enough bullet body in the neck to maintain neck tension. They still shoot very accurately even with that limitation.