elkrazy
I am probably one of the least experienced kritter killers here, but will give you my experience with Scirocco bullets.
Several years ago, I was working in a gun store and was hearing accounts of them being inconsistent in terms of expansion, I chalked that up to some sour grapes due to poor shooting. I started using them in my 7 RM because Mule Deer had written that they were individually tested for concentricity on a Juenke machine. They shot very well in my rifle.
I shot one mature mule deer buck at 425 paces, and the bullet performed well, penetrating diagonally from front shoulder to hip.
With a bullet from the same box, and about a half mile away, I shot an antelope through the lungs at about 60 yards and heard the bullet ricochet of the earth after it went through her. She ran perhaps 150 yards and died. There was very little internal damage.
A year or two later, on a quick shot at a cow elk, I hit the spine in just behind the last rib. The bullet blew a crater in the animal and did not break the spine. She had to be shot again.
Later, in discussions here at the campfire, Mule Deer related that in discussions with Swift, he couldn't determine if they did actually test each bullet on a Juenke tester. (Hope I am spelling that correctly)
I tried to recreate the blow up by shooting into test medium (a anti-freeze jug filled with water in front of dry newspaper) but couldn't do it.
However, based on reports from others of inconsistent expansion and my limited experience of the same thing, I stopped using Scirocco bullets, even though they have a new version. There are just too many bullets out there that I KNOW are going to work to chance using one I am not confident in.
Just my admittedly very limited experience.
Fred