I don't load either one.....but the bullet diameter difference between the two is about .015. So, I would think that stretching those necks out another 15 tho. to load the fatter 8mm bullet can't help give you longer case life.
I'd buy the brass for the 325...and I'd buy quality brass. It seems to me it would have to give you many more reloads.
MHO
Dave
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