Yeah but how many options do we have now compared to 70+ years ago
The Partition works, no doubt - but it's not a go-to hunting bullet for most hunters anymore for many reasons
I killed a few truckloads of game with Partitions but I haven't used them in many years. Yes, they kill well but so do many other bullets. If you want to stick with Nosler, the Accubond line of bullets basically does the same thing as a partition- open up fast then keep the shank together to penetrate well. But due to it's bonding there is less shrapnel in the meat which was always an issue with Partitions. And the Accubonds are much more aerodynamic as well.
I've actually had a Partition fail (which I never thought possible) when it hit the spine of a giant 7 foot black bear spine. The front blew off as always but the shank tumbled and lost it's rear core, too. I was shooting down at the bear at pretty close range so no doubt the bullet was stressed. But we found it under the hide, it did not smash through the vertebrae as I would have thought. I know for a fact a Barnes TSX/TTSX would have plowed through as I've done a similar thing with them. And I think an Accubond with the bonding would have held together too.
I once shot a 260 Accubond from my 375 Ruger end to end on another huge black bear. Bullet entered the chest (frontal shot) and we found it when skinning out the hams, just under the hide. The bullet looked perfect., like you would see in a promotional advertisement. IIRC it was about 70% weight retention. Would a partition have done the same? I am sure it would have killed the bear, but it probably would have thrown shrapnel all through it and not penetrated as deep because once that front section is gone you are into 50% weight retention.? I'm just guessing at that but that's about normal from Partitons I have recovered if I remember correctly.
Even Nosler says that the process of making Partitions is very costly and it's easy to see why when you look at it. Bonding lead to copper is going to be a much more streamlined process than having a front and rear lead core with a copper partition in the middle. Even all copper bullet manufacture is less complex.
I will never say that the Nosler partition is a "BAD" bullet, I killed way too many animals with them. But I will state why I don't use them anymore.
Expensive for what you get
Poor BC compared to many other similarly capable bullets
I've never had a problem figuring out an accurate load with the NP but no question the partition in the middle of the bullet lends an "imbalance"(for lack of a better word) and many other bullets the accurate and fast load will show up quicker.
Front *and maybe rear) blows off really easily (maybe even more easy than many regular cup and core bullets, because the front lead section of the NP is small compared to the whole lead core of a standard bullet)
Lots of shrapnel in meat
NP's were created to PENETRATE. They started because of poor penetration with standard bullets on a wet muddy moose in Alaska. We have all heard the Partition story. Yup they were supposed to open up fast and penetrate but lots of bullets do that. These days we have bonded bullets that open fast and retain more % of weight and penetrate. We have copper bullets that also open up fast, retain weight and don't blow lead all through your meat. if you want PENETRATION there are better bullets to achieve that.
if I went on a trip and was a visiting hunter and got handed a 30-06 and a bunch of ammo loaded with 150-180 gr Partitions I would say "ok lets go kill a moose " with complete confidence in the bullet. But if I had a choice of any bullet, NP would be several steps from the top/