This is one in a range of cartridges developed by Bruce Baer of Baer Custom Rifles from Willow Hill, PA.   

This was the first of four cartridges that were offered by Savage and dates from around 1895 and was chambered in the M1895 lever action rifle. It appeared at around the same time as the 30-30 Winchester, also launched in 1895. This is a Factory engraved M1895 Deluxe...

                               PROOF Case looks like a darkened copper cladding. Might be a PROOF LOAD          ...

Speer

The .300 Remington Ultra Magnum made its debut in 1999, followed by the 7mm Remington Ultra Magnum and in 2002 the .338 & .375 Remington Ultra Magnum were introduced.  The Remington Ultra Magnums, joined an increasingly popular trend toward beltless,...

The 300 PRC was developed by Joe Thielen, who was the assistant director of engineering at Hornady when the 375 Ruger was launched in 2007. It is based on the 375 Ruger necked down with the shoulder moved slightly back and was originally called the 30-375 Ruger. The...

     The 300 Phoenix is a proprietary cartridge developed by G. McMillan & Co. of Phoenix, Arizona, USA, in 1991. This cartridge is based on the 416 Rigby case necked down to 308 caliber.

The 300 Pegasus was developed during 1994 in an attempt to push .30 cal bullets past 3,500 fps. The head is basically the same as for the 378 Weatherby, but without the belt.

     8mm Rem Mag case necked to .30 cal with a 35° shoulder. You can have a look at the website HERE

     In the early 1980s Aubrey White and Noburo Uno of North American Shooting Systems (NASS) based in British Columbia Canada began experimenting with the full length .404 Jeffery by reducing the taper and necking it down to various calibers such...

Designed by the British firm Holland & Holland, the .300 H&H Magnum was introduced in 1925, based on the .375 H&H magnum case necked down to .30 caliber.    Different versions with and without primer crimp         ...