Buckeye Hunter,
The BT Nosler is great for some applications and groups very well, but until you get into the .338s it is not able to take very much abuse and hold up.
On the other hand, the Nosler Partition in the .243 will take everything you can dish out!
Expect it to expand back to the partition, and maybe even loose most everything ahead of the partition but the rest of the bullet will just keep doing what it was sent for.
I first used the partition in the 243 over 30years ago, back when you could see and feel the machine marks on the sides of the bullet. I started using the partition because another bullet came apart (shed the jacket) on my first mule deet buck taken with my handloads.
Since that time, I have more often then not used a partition of some size, depending on the caliber I was shooting. And, I have seen them do their job and not distroy a lot of meat when the same hit with a typical bullet would have left the makings for a lot of mince meat.
Most/many of the bullets are better now (including the brand that came apart) then they used to be, and there are a number of very good bullets of which the Nosler Partition is one!! The machinics, way of making, the partition is different then it was 30 - 40 years ago, but you can depend on it to do what you send it to do, providing the shooter does their part AND the cal. is up to the task.
And yes, it is better then the Rem. corelok!! :wink: