TomN I have a 35Sambar, that is a 300WSM necked up to 358 and its ballistics just about mirror the 358Nm. Woodleigh make 275 grain PP for this calibre. They would perform better out of the 358Nm as you would not be eating into the powder space as much as on the 35Sambar. I would say that if you are after bear or big Moose these would do the job nicely.