Not sure I understand the chart - what is the percentage indicating?
A 357 magnum handles more than twice as much pressure as a 38 Special +P.
The velocity is about 50% faster than the 38 Special +P.
Whatever is happening to stop that bullet i.e.: Hydrashock, bone, etc is going to be significant.
We (my wife and I) have CCI Blazer 38 Special +P's 125 gr JHP in our 357s.
https://www.midsouthshooterssupply.c...?sku=000203514
They were a couple dollars cheaper per box when I bought them last year.
My wife appreciates the lower recoil especially in her Ruger SP101.