Re: Do I resize new Lapua brass?
I resize new brass.
That brass gets tossed around, dropped on pallets, vibrates in a packing box on the train/truck/UPS delivery van and I like to take out the minor variations induced thereby with a full-length sizing operation (and a one-time uniforming of the primer pockets). Load, fire, clean, anneal, resize, trim, repeat.
YMMV.