Why I'm not going to rejoin the NRA just yet.

[friendly_iconoclast]

56. That's not answering the question.

And maybe you shouldn't have access to gasoline because you might kill 87 people with it:

http://en.wikipedia.org/wiki/Happy_Land_fire

I'd also note that oh-so-wise lawmakers of California find the following firearms and cartridges perfectly acceptable for use in the Golden State.
Most of them are more accurate at long distances than the the .50 caliber. Seems the CA Legislature exhausted their supply of FUD, as none of these seem to
be any more of a problem than the .50s were:

http://en.wikipedia.org/wiki/.338_Lapua_Magnum

The .338 Lapua Magnum (8.6x70mm or 8.58x70mm) is a specialized rimless bottlenecked centerfire cartridge developed for military long-range sniper rifles. The Afghanistan War and Iraq War made it a combat-proven round with ready and substantial ammunition availability. The .338 Lapua is a dual-purpose anti-personnel and anti-materiel round...

http://en.wikipedia.org/wiki/C14_Timberwolf

The C14 Timberwolf MRSWS (Medium Range Sniper Weapon System) is a manually operated bolt action sniper rifle built by the Canadian arms company PGW Defence Technologies Inc. In 2005 they won the contract to supply the Canadian Forces Land Command with the C14 Timberwolf MRSWS for $4.5million.

The military version of the rifle, which is being used to replace the C3A1 sniper rifle, started as a civilian precision sport rifle. The military rifle however has several modifications to make it better suited for military use and many accessories are available.

The official military designation for the rifle is C14 Timberwolf Medium Range Sniper Weapon System (MRSWS)...

http://barrett.net/firearms/model98b

Thanks to its modular layout, this rifle can be adapted to fit each user’s exact needs. Its straight-line design, running from the muzzle to the shooter’s shoulder, tames recoil. It also allows for faster, more accurate follow-up shots fed from the 10-round detachable magazine. The ergonomic pistol grip reduces muscle fatigue and provides total control over the fully adjustable trigger. An intuitive, thumb-operated safety can be accessed without compromising the firing grip. This allows the shooter to maintain a solid weld to the adjustable cheek piece. The oversized bolt handle can be easily manipulated, feeding a fresh round into the chamber as the bolt silently glides through a polymer guide.
Model 98B

The Model 98B rifle’s aluminum upper receiver boasts an 18-inch M1913 optics rail, offering plenty of space to mount substantial optics as well as a night vision device or other accessories. The forward receiver is drilled and tapped for accessory rails to be mounted at the 3, 6 and 9 o’clock positions.

This impressive long-range weapon isn’t all work. Equipped with a rear monopod and forward bipod, it’s also a pleasure to shoot. From its highly efficient muzzle brake to its shooter-adaptable design and unprecedented performance, the 98B is ingenuity in action...

http://en.wikipedia.org/wiki/.416_Barrett

The Barrett .416 cartridge was designed by Chris Barrett, son of Ronnie Barrett. The bullet was designed using NACA low-supersonic-drag equations to design the shape.

The cartridge was designed as an improvement to the .50 BMG cartridge, a common machine-gun and rifle cartridge. It is similar to a wildcatted .50 BMG case, shortened to 3.27 inches (83.06 mm) and necked down to accept a .416 caliber, 400-grain (26 g) projectile; It is however of proprietary dimension. Because the two cartridges, the .50 BMG and .416 Barrett, have identical base dimensions, all that is needed to convert a rifle to use one or the other cartridge is a relatively quick barrel swap.

For some time, the only commercially-available rifle in this chambering was the single-shot Barrett Model 99. In August 2009, Zel Custom Manufacturing released the Tactilite .416 Barrett upper for AR-style rifles. Recently the Bohica Arms FAR-50 MK-II bolt-action, single-shot AR-15 upper receiver conversion became also available in .416 Barrett. Noreen rifles makes a rifle in .416 Barrett and other large calibers. Barrett now also chambers its semi-automatic M82A1 in .416 Barrett...

...A few jurisdictions in the United States, most notably California as well as a few nations such as Australia, Belgium, Italy and the Netherlands restrict or prohibit civilian ownership of rifles chambered to use the .50 BMG cartridge, but not the .416 Barrett...

http://en.wikipedia.org/wiki/Steyr_HS_.50

HS .460

...The rifle is also available in the proprietary .460 Steyr round, developed for markets where ownership of the .50 BMG by private citizens is banned, but .46 rounds are not, such as California. The .460 caliber version is known as the HS .460.