I'm still learning and I am wondering why BERB HBRN TP, which is a plated bullet, has a bigger max charge than the jacketed ones. Is there a logic to this?
The Berry HBRN is the newest bullet shown, and therefore is the result of the most modern testing. The HBRN has been introduced since I've been a moderator here.
In fact, Berry was a sponsor of this board. We received some of the very first HBRN bullet samples and tested them for this very same forum.
Generally speaking, plated bullets are softer than jacketed. While they generally fall in hardness between Lead and Jacketed, they are much more akin to lead because a jacket is rolled and "work hardened", whereas the plating is pure alloy deposited onto a lead core one molecule at a time via the plating process. So although the plating may be thick and "tough", it will never be truly "hard".
I say all that to get you to understand that a soft bullet conforms to a barrel faster and therefore starts to move down the barrel sooner than a hard bullet. Moving sooner means that
for the same load, pressures are lower. Therefore loads must go higher to move them at equivalent speeds.
Secondly, if you are looking at the posted data, notice that no ownership is assigned to the LCN bullet. That could be anybody's bullet, cast or struck, and with any type of lube.
