Originally Posted by spittinfire
Robo, correct me if I'm wrong but didn't the 30-30 start out as 30WCF and when Marlin built a rifle of the same caliber they didn't want to put Winchester's name on their rifles so they called it a 30-30 and over time the two names became interchangable.
I believe that is indeed correct. Winchester used proprietary names on their cartridges. Others would not give free advertising to Winchester (perhaps there was some copyright issues also) so they would rename the cartridge for their purposes.
You still see this in cartridges like the .38 S&W Special and .44 S&W Special (the actual names) have been used so extensively with out the S&W part of their names many folks forget the real name.
The venerable .44 Remington Magnum has become simply the .44 mag. Remington ammo is still head stamped 44 Rem Mag, but everyone else drops the "Rem" from the name.
Partnerships in new cartridge/gun design have linked arms and ammo makers in several endeavors. When a gun maker is also an ammo maker, it leads to names that others would rather not advertise. S&W, Remington and Winchester each make (or used to make) both guns and ammo. S&W sold there ammo line to Federal, Winchester is pretty much out of the gun business and Remington still makes both but are no longer in the handgun business.