Outlaws said:
I may be incorrect in my following asseration, but, the .50BMG is just a scaled up 30-06, at least in physical dimensions.
Yep. Browning took the 30-06 and just enlarged it for the most part.
It wasn't J.M. Browning, it was Frankford Arsenal.
Actually, there seems to be a lot of confusion about the history, as Datig's "Cartridges For Collectors Vol II" has erroneous information (even if the illustrations are accurate).
I much rather trust the more thorough, meticulously detailed, and annotated account in Hackley, Woodin, and Scranton's "History of Modern U.S. Military Small Arms Ammunition Vol I":
1. General Pershing wanted a big cartridge, mainly for aircraft machine-guns.
2. Winchester started development, starting with necked-down 16-ga shotgun shells.
3. Winchester designed their own rimmed .50 cal cartridge
4. Ordnance wanted a rimless cartridge to function better in Browning MG's, so Winchester came up with several rimless cartridges. One was intended for a Winchester anti-tank rifle as well.
5. Early Browning .50 MG's were manufactured based on the current Winchester cartridge spec.
6. After Winchester failed to meet performance requirements, Frankford Arsenal took over the project.
7. Frankford started with the design of the German 13mm Mauser AT-rifle cartridge, and kept the 13mm's feature of a rim. Note that the 13x99 Mauser cartridge also was used in both anti-tank rifles and in aircraft heavy MG's.
8. Ordnance told Frankford what they had told Winchester - that a rimless cartridge was more suitable for Browning MG use (tell that to the guys running 7.62x54R in their BMG's these days!).
8. Frankford finally started again, by scaling-up the .30-06 cartridge. Illustrated in Frankford Arsenal Drawing B-7395, May 6, 1919, "Cal. .50 Ball Cartridge, Model of 1919". With minor changes this is the round we all know and love as the ".50 BMG".
FWIW, the Soviet 12.7x108 has been used in both heavy MG's and anti-material rifles. Their 7.62x54R has been used in MG's, battle rifles, and sniper rifles.
The 8mm Mauser was used in MG's, battle rifles, and sniper rifles. But I don't think anybody(military) is using it today, if they have a modern alternative available.
I'm surprised nobody has mentioned the M1C and M1D Garand or the M1903A4, M1903A5, and M1903A1/Unertl from WWII and Korea. These were US-issue sniping rifles chambered in .30-06.
The bottom line is that militaries have tended to start with their standard-issue rifles to convert them to sniper rifles, and thus they have kept the standard-issue rifle's chambering. It does make some logistical sense as well, although some forces (US included) have produced special loadings exclusively for sniper use. But having your sniper rifle shoot the same ammo as your battle rifles and machine-guns is convenient. Since the .30-06 (and 8mm Mauser!) was replaced by the 7.62 NATO 50 years ago, subsequent sniper rifles have used 7.62 NATO.
And with the militarization of law-enforcement, civilian snipers tend to use the same chamberings that their military does.