In all honesty, I have never looked at barrel life as a factor in choosing a cartridge…if I did, I would never had designed my own wildcats on the full sized 416 Rigby case by moving the shoulder and necking it down and blowing it out. The end design; a 338-416 Rigby Improved 45° shoulder that is remarkably similar to the 33XC that came much later, is a pure efficient machine using 285-325g bullets.
I use a custom brass CNC turned solid brass 323g bullet for 1 mile and 2000 metre comp shoots, all bullet weights are well above 3000fps and the brass solid leaves the muzzle at 3200fps +/-.
I also designed a 30 and 375 on the same case, but never actually had the reamers made due to my circumstances changing in Feb 2022.
Cheers.