Forum member Andy (aka GreyMist) has completed an interesting test, with five (5) different types of .243 Winchester Brass. He collected Federal, Lapua, Remington, and two different lots of Winchester-brand brass. Then he selected ten (10) cases at random from each brand and measured their weights.
243 Win. / 5.8 g (90 gr) FMJ - Lapua
It's 308 Day! – 308 Winchester – What, Why, and our Appreciation for ItThe Firearm Blog
243 Winchester « Daily Bulletin
Reloading Cases, Lapua Brass
Nosler Trophy Grade .243 Winchester 85 Gr. Partition- Box of 20
Daily Bulletin
6.5mm Creedmoor - Wikipedia
Winchester Brass 243 Winchester Bag of 50
Norma Tipstrike .243 Winchester 76 Grain Norma Tipstrike Brass Cased Centerfire Rifle Ammunition 20160052 $1.90 Off
Read all of Friday's SHOT Show news
243 Winchester Loading Data - The Old Deer Hunters
6.5mm Creedmoor - Wikipedia