Wiggy
I know I am thinking backwards, but this is what I have found... the shockwaves work very well at longer ranges an in fact they expand at the longer ranges and really do the job they were intended to do. I have asked myself why and what I have come with is - what is the difference? the difference is velocity!! They are traveling slower and now they have time to expand instead of penciling their way through. The other varible is to shoot a thicker skinned animal - the bullet will work much better there than it does on a whitetail - again the bullet velocity is slowed considerably by the thicker skin... So therefore - I am backwards when comes to shockwaves - the big sin is to much velocity - if your shot had been @ 150 yards it would have expanded perfectly. I'm nuts I know but everything I have read is leading me down that path.
Another example I shoot .451/260 grain Nosler for whitetail - Iget equal expansion with this bullet from 20 yards to 175 yards. Shooting that across my chrono I am shooting it on average 1860 fps. I have shot deer with it through all the ranges and the expansion remains constant...
Here is the pic of a recovered Nosler... When I got the bullet out there actually was a little lead left in the top section of the bullet but later when I cleaned it up the lead dropped out in the in the sink- so it actually would have weighed slightly more.
I have gotten this same expansion with a much less expensive bullet also. The Speer .452/250 grain Gold Dot reacts much the same way.
Both of these bullets creat a tremendous amount of hydrostatic shock as they pass through the vitals area - just turn it to jello. This shock is so great the animal tends to drop right away even on a arginal shot.
Sorry about running off on a tangent