Based on belt or headspace? Increased velocity? Marketing? And the answer is
GUN DIGEST MAGAZINE, JUNE 3, 2013, SMITH & WESSON'S M&P, WALTHER'S
What is a magnum of wine? Discover the wine magnum
2005-2009 Dodge Magnum production car
Jon R. Sundra, Author at Gun Digest
A Magnum Only by Heritage - Shooting Times
What is a champagne magnum? – G.H.Mumm
What Exactly Is A Magnum?
Guns and Gear The Daily Caller
GUN DIGEST MAGAZINE, JUNE 3, 2013, SMITH & WESSON'S M&P, WALTHER'S
357 Magnum: The OG Magnum Revolver Round Is Still Relevant
Kasey Reilly - Taurus Raging Bull .44 Magnum
2011 — Quality Briar
It's been a while since I've had a Magnum, but didn't they used to be bigger? : r/mildlyinfuriating
Behind the Bullet: 8mm Remington Magnum
Magnum has repackaged DNA into an awesome chrome gold tub - Stack3d
