Thanks for your thoughts Dave.
Yes the PR is a solid lead bullet. Not jacketed.
I once did a bullet test with the Partitions and the PR plus a few other bullet types. It was the same test the Chapman didshooting into a bucket of tamped black earth length ways. The PR passed through the bucket and lodged in a 2x6 I had behind it. It expanded to about 1" dia.
The Nosler, on the other hand, passed through the bucket and the 2x6!

Both shoot extremely well in the Omega.