What was a cartridge developed for the Browning .50 caliber machine gun in the late 1910, was banned in California which led to the adoption of a French rifle cartridge developed by Eric Danis? 
.50 Browning Machine Gun
.510 DTC EUROP
The .510 DTC EUROP is a French rifle cartridge developed by Eric Danis in order to comply with firearms legislation in Europe which regulates .50 BMG rifles.
 In response to the .50 Caliber BMG Regulation Act of 2004, which banned future sales of .50 BMG shoulder-fired rifles in California, long-range shooters in that state have begun to adopt this cartridge as a manner of following the new legislation.
.50 BMG
The .50 Browning Machine Gun (.50 BMG, 12.7×99mm NATO and designated as the 50 Browning by the C.I.P.) is a cartridge developed for the Browning .50 caliber machine gun in the late 1910s.
 Entering service officially in 1921, the round is based on a greatly scaled-up .30-06 cartridge.
 Under STANAG 4383, it is a standard cartridge for NATO forces as well as many non-NATO countries.
 The cartridge itself has been made in many variants: multiple generations of regular ball, tracer, armor-piercing (AP), incendiary, and saboted sub-caliber rounds.
 The rounds intended for machine guns are linked using metallic links.
Nicholas Lamia
Nicholas Lamia’s outfit from the Naval Combat Demolition Unit’s (NCDU) Assault Force 'O' of the Western Naval Task Force assaulted Normandy Beach on 6 June 1944.
 It had 16 Landing Craft’s Mechanized (LCM’s) that were the initial assault force and was the first force to reach Omaha beach on D-Day.
 Nicholas Lamia’s LCM was full of engineers and demolitions troops to clear the beach of obstacles (20 Army 20 Navy).
 His job during D-day was to land the men on the beach during the amphibious assaults while he manned the 50 caliber machine gun.
 Lamia’s LCM approached the beach under terrible automatic fire and almost without exception every LCM was subjected to mortar, machine gun and German "88" barrages.
 As Lamia (with the initial assault force) approached the beach they received fire from a two story building on the hill.
 Nicholas Lamia and Joey Kuntz both focused their 50 caliber machine gun fire on the building’s window.
 They saw an explosion in the building and the firing from the building ceased.
 The boat was cleared of the Engineers under vicious fire and the ramp was lifted.
 The moment Lamia’s ramp reached the top closed position, the LCM was hit by a German 88 mm round and tore the ramp open like a tin can, but it did not sink.
 Of the 16 LCM’s in NCDU, 13 were sunk or out of commission. .300 Savage
The .300 Savage cartridge is a rimless, .30 caliber rifle cartridge developed by the Savage Arms Company in 1920.
 It was designed to replace the less powerful .303 Savage in their popular Savage Model 99 lever-action rifle.
 Despite having a short case and a rather stumpy neck, the cartridge is capable of propelling a 150 gr bullet at over 2600 ft/s with an effective range of over 300 yards . 7.62×45mm
The 7.62×45mm (designated as the 7,62 × 45 by the C.I.P.) is a rimless bottlenecked intermediate rifle cartridge developed in Czechoslovakia.
 It is fired by the Czech vz.
 52 rifle, Vz.
 52 machine gun and ZB-530 light machine gun.
 The round was later dropped from use when the Czech converted to the standard Warsaw Pact round, the 7.62×39mm (fired by vz.
 52/57 rifle and vz.
 52/57 light machine gun).
 Its muzzle velocity and muzzle energy are slightly higher than that of the 7.62×39mm cartridge. .303 Savage
The .303 Savage is a rimmed, .30 caliber rifle cartridge developed by the Savage Arms Company in 1894 which was designed as a short action cartridge for their popular Savage Model 99 hammerless lever-action rifle.
 The cartridge was designed for smokeless powder at a time when black-powder cartridges were still popular.
 The .303 Savage round was ballistically superior to the .30-30 Winchester, but only marginally.
 The .303 Savage remained popular through the 1930s. .45-75 Winchester
The .45-75 Winchester "Centennial" is a centerfire rifle cartridge developed in 1876 for the newly designed Winchester Model 1876 "Centennial" lever-action rifle.
 Winchester Repeating Arms Company introduced the new rifle and cartridge at the United States Centennial Exposition.
 The Model 1876 rifle used an enlarged version of the famous Winchester Model 1873 action to offer a lever-action repeating rifle using cartridges suitable for big-game hunting.
 The cartridge and rifle enjoyed brief popularity with Gilded Age American hunters including Theodore Roosevelt, and was issued to the Canadian North-West Mounted Police and to Texas Rangers. .475 A&amp;M Magnum
The .475 A&M Magnum is a rifle cartridge developed in the United States.
 At the time of its development it was considered the most powerful sporting rifle cartridge ever developed.
 However, as the .475 A&M Magnum was a wildcat cartridge, the .460 Weatherby Magnum continued to be the most powerful commercial sporting cartridge available. XM806
The XM806 Lightweight .50 Caliber Machine Gun (LW50MG) was a developmental .50 caliber belt-fed heavy machine gun.
 Development began in 2009 and was cancelled in 2012. M2 Browning
The M2 Machine Gun or Browning .50 Caliber Machine Gun is a heavy machine gun designed toward the end of World War I by John Browning.
 Its design is similar to Browning's earlier M1919 Browning machine gun, which was chambered for the .30-06 cartridge.
 The M2 uses the much larger and much more powerful .50 BMG cartridge, which was developed alongside and takes its name from the gun itself (BMG standing for "Browning Machine Gun").
 It has been referred to as "Ma Deuce", in reference to its M2 nomenclature.
 The design has had many specific designations; the official designation for the current infantry type is Browning Machine Gun, Cal.
 .50, M2, HB, Flexible.
 It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications and low-flying aircraft.
 The M2 has been produced longer than any other machine gun.