In a chart that Handloader Magazine published some years ago testing around 30 different 180 grain bullets side by side through wet paper medium I think they used. The round nose Core-Lokt was nearly the only one that mushroomed perfectly without losing it's lead core from 3,000. fps all the way down to 1,700 fps. Penetration through the medium went up when velocity went down as the mushroomed bullet's diameter was reduced. I ordered that chart from the author and commended him on all the extensive testing that he had done.
I have had that chart stuck on my gun safe for at least the last 20 years. I retired in 2003 and it was up several years before that.Lot of good info there.
