Question: The .308 Norma Magnum was superseded in popularity by a firearm that was released in what year?

Context paragraphs:
.308 Norma Magnum: The .308 Norma Magnum (7.62×65mmBR) cartridge was created by Nils Kvale at Norma, Sweden.  Like the larger .358 Norma Magnum it is based on the .300 H&H Magnum.  The length of the case is the longest that would fit in a standard Mauser action.  While it appeared to have a bright future initially, it was soon superseded in popularity by the .300 Winchester Magnum.  The first, and one of the few, manufacturers to offer rifles in .308 Norma Magnum was Schultz & Larsen of Denmark and they still are.

Colt Python: The Colt Python is a .357 Magnum caliber revolver formerly manufactured by Colt's Manufacturing Company of Hartford, Connecticut.  It is sometimes referred to as a "Combat Magnum".  It was first introduced in 1955, the same year as Smith & Wesson's M29 .44 Magnum.  Now discontinued, the Colt Python targeted the premium revolver market segment.  Some firearm collectors and writers such as Jeff Cooper, Ian V. Hogg, Chuck Hawks, Leroy Thompson, Scott Wolber, Renee Smeets and Martin Dougherty have described the Python as the finest production revolver ever made.

.300 Winchester Magnum: The .300 Winchester Magnum (also known as .300 Win Mag or 300WM) (7.62×67mm) is a belted, bottlenecked magnum rifle cartridge that was introduced by Winchester Repeating Arms Company in 1963.  The .300 Winchester Magnum is a magnum cartridge designed to fit in a standard rifle action.  It is based on the .375 H&H Magnum, which has been blown out, shortened, and necked down to accept a .30 caliber (7.62 mm) bullet.

.256 Winchester Magnum: The .256 Winchester Magnum was a firearms cartridge developed by Winchester, and was produced by necking-down a .357 Magnum cartridge to .257 diameter.  It was designed for shooting small game and varmints. Introduced in 1960, Winchester offered ammo and reloading components into the early 1990s.  The cartridge was first chambered in the Ruger Hawkeye single shot pistol.  The next year (1962) Marlin chambered their Model 62 Levermatic rifle for the new Winchester cartridge.  These were the two principal firearms chambered for the .256 Win.  Mag.  It is now obsolete and only offered as a chambering by custom manufacturers of single-shot firearm barrels such as Match Grade Machine and Bullberry.  Previously, the T/C Custom Shop had produced some, before closing its doors forever in 2010.

.300 Norma Magnum: The .300 Norma Magnum is a cartridge that has begun to gain popularity in the long range shooting community.  The .300 Norma Magnum is a .338 Norma Magnum case necked down to .308 caliber.  This cartridge was named .300 Norma Magnum to differentiate it from the .308 Norma Magnum designed in 1960.  The United States Special Operations Command (SOCOM) has selected .300 Norma Magnum as their new Advanced Sniper Rifle Cartridge (2016).

6.5mm Creedmoor: The 6.5mm Creedmoor, also called the 6.5 Creedmoor or 6.5 CM for short, is a centerfire rifle cartridge introduced by Hornady in 2007 as a modification of the .30 TC, which was based on the .308 Winchester.  It was designed specifically for rifle target shooting, although it is also achieving success in game hunting.  Bullet for bullet, the 6.5mm Creedmoor achieves a slower muzzle velocity than longer cartridges such as the 6.5-284 Norma or magnum cartridges such as the 6.5mm Remington Magnum.  However, due to its 2.825 in overall length, it is capable of being chambered in short-action bolt action rifles and AR-10 semi-automatic rifles.

Chase the Dragon: Chase the Dragon is the third studio album by English rock band Magnum.  It was released in 1982 on Jet Records.  Overseen by the Kansas producer Jeff Glixman, "Chase the Dragon" was the first recorded appearance by the new keyboard player Mark Stanway, although he had made his live debut at Magnum's appearance at the Reading Festival in 1980.  The album was recorded over 13 days at Town House Studios in London, and the following year Tony Clarkin flew to Axis Studios in Atlanta to mix it.  However, there was a two-year delay before the album's release in 1982.  Many of the tracks have remained in Magnum's live set for many years, including "Soldier of the Line", "The Spirit" and "Sacred Hour".

.358 Norma Magnum: The .358 Norma Magnum (.358 NM or 9.1x64mmBR) is a bolt action rifle cartridge introduced in 1959 by Swedish company, Norma.  It is closely related to the smaller-bullet .308 Norma Magnum.  Both calibers share the same dimensions of the case head as the .300 H&H Magnum, but have far less body taper, resulting in the same internal capacity in a shorter case.  The cartridge case is the longest that will comfortably fit in a standard Mauser action, or any rifle action designed to chamber the 30-06.  The .358 NM was the first .35 caliber cartridge commercially developed and sold to the American market since the decline of the .35 Newton in the late 1920s.

.338 Norma Magnum: The .338 Norma Magnum is a cartridge first introduced in 2008 and came into production in 2009, designed by Norma of Sweden.

Sako TRG: The Sako TRG is a bolt-action sniper rifle line designed and manufactured by the Finnish firearm manufacturer, SAKO of Riihimäki.  The TRG-21 and TRG-22 are designed to fire standard .308 Winchester or 7.62×51mm NATO cartridge, while the TRG-41 and TRG-42 are designed to fire the more powerful .300 Winchester Magnum and .338 Lapua Magnum cartridge and therefore having a standard larger action and barrel.  They are available with olive drab green, desert tan/coyote brown, dark earth or black stocks, and are also available with a folding stock.

Supporting paragraphs: .308 Norma Magnum .300 Winchester Magnum
Answer: 1963