SB,
Last week I did some penetration and expansion tests with the 285 grain Privi bullets. They were launched at 2070 fps to match Norma factory ballistics.
The range was 15 yards from the muzzle to impact point, just far enough to keep from getting wet and still have around 2000 fps at impact.
The test medium was plastic jugs that were 8" front to back filled with water and placed in a row back to back.
I only fired 2 of the Privi bullets for this test but the results were pretty much the same.
The bullets penetrated 5 of the jugs and actually left a hole in the face of the 6th jug. 40+ inches of penetration. Both expanded into a classic mushroom down to the 1st cannelure. The 1st 2 jugs exploded and the 3rd jug split its sides out. The 4th and 5th jugs also split their sides about 50%. Lots of energy transfer.
I have not shot any living creature with this bullet yet but I have to believe that it will work well on most game animals in North America. I plan on putting them to the test this coming December on my annual deer hunt with my son in western Tennessee.
I will post pictures of the 2 test bullets in the next day or two.