A quote from Nosler manual 6
“Some shooters assume that John Nosler would have “fixed” the Partition somehow, if he’d only known about the concept of weight retention. Well, he did, but John never felt 90 or 100 percent weight retention was optimum. Instead, he wanted an all around bullet, one that expanded rapidly and actually lost some weight, specifically from the front core. This, he felt, made for quicker kills on smaller animals (for instance, a deer encountered during an elk hunt) both because of the front end’s rapid expansion and the fragments that sprayed off during penetration.”
There are plenty of good bullets out there today but I think Nosler knows what they are doing. Albeit at a premium price