Yep, sometimes known as the Page Sooper Pooper, after Warren Page, a late great shooter and writer. Not long ago I wildcatted the .30 WCF by simply shortening the neck to about .2." I call it the .30 WCC (.30 Winchester CircumCised).
The new tacti-cool spec ops T&Ed .300 Blackout is slick; .
The .458SOCOM is honorable mention. You would NOT want that sailing thru the air at your head!
CF
ps: Big ups to the classic .50BMG. When you hold a milspec cartridge that looks like a handmade cigar you have to be impressed. A .50BMG bullet(fired by a military sniper from Canada in 2002) held the world record for a military confirmed kill for years.
I always thought the .454 Cassull was pretty cool. That and 20mm Lahti and 20mm Vulcan are both pretty cool sounding. Of course the Tyrannosaur and Nitro Express deserve mentions.