Did you weight the bullet? Nosler told me they were designed to maintain 70%, same as the partition.
I recovered two this year and the 70% is pretty much spot on. Both were .277 140's.
One came from a 320 yard buck quartering towards the shooter entering the front shoulder and lodging under the hide in the ham. 99 grains retained=70.7%.
The other was a 60 yard quartering towards the shooter WT buck and the bullet again entered the shoulder blade and was found in the front portion of the ham under hide. 96 grains retained=68.5%.
