Thread: Best 7mm projectile for shooting large deer

Partiton's have changed over the years, originals were made by drilling out solid rod, then from tube, and finialy swaging
I've never had one break, and I've got a mate with a coffee cup of them, all nicely mushroomed, taken out of bison, moose, bears and elk,

Nosler has this to say.

When word got out that the old Partition was being phased out, a buying frenzy spread rapidly throughout the hunting world. After all, some suggested, there was no way the new bullet could be as good as the old one. Adding to the panic was Nosler’s decision to delay production of the larger calibers; it was not long before some hunters who had rifles in .375 H&H Mag. were willing to pay $5 each for 300-gr. Partitions. There were minor production issues early on, but once they were history the new bullet proved to be a big improvement over the old bullet, and it mostly had to do with differences in the grain structures of the two jacket materials being used. In addition to being harder, the grain of the old material ran at right angles to the axis of the bullet, and that encouraged the wall of the front cavity to shear off when expansion reached the partition. When that happened, none of the front lead core was retained. In addition to being softer and more ductile, the grain structure of the new material ran parallel to the axis of the bullet, and that enabled it to curl back against the partition without shearing off. The result was a larger frontal diameter along with higher retained weight due to partial retention of the front core.