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That's certainly interesting, so starting on 35gr may not be the worst option. Good to know.
Is that from the Sierra reloading manual or something like that?

Cheers for that. I couldn't seem to find anything on the matter online.
Personally prefer to ask that assume, particularly when dealing with high pressure etc.

Woops. I know I had 243win in the title at SOMEPOINT, While I was writing the post. I must have deleted it by accident. But yes it is 243win.

I'm brand new to reloading and I don't have a sounding board for it in real life, so I thought it best to ask here.

I'm looking to work up a load using:
PPU brass cases
Sierra Gamechanger 90gr...