According to my friend at Nosler (I have a house in Redmond and been shopping at their factory store for over 20 years) this cartridge actually isn't the 260 Weller. The 26 Nosler is actually based on a necked down 375 Ruger case and I believe the 260 Weller is based off a necked down 7mm Dakota...the 26 Nosler has a case capacity of 93g of water. It was officially released at SHOT last week.
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