Its the weight of the ammunition
Glock model
Expanding Full Metal Jacket
Full Metal jacket.
Springfield. Like "30-06 SPRG."
Simply put, ammunition that is loaded to a higher pressure to achieve more velocity.
http://www.handgunsmag.com/ammunition/demystplusp_0306-7/index.html
HST are semi-jacketed hollow point ammunition, and the initials are for Hydra Shock Two, indicating that they are the next generation of the Hydra Shock bullet.
It's a warning to the user that the only compatible ammunition for that rifle is the .22 Winchester Magnum Rimfire (22 WMRF), and other types of .22 ammunition are NOT compatible.
Browning did not make ammunition. They branded ammunition made for them.
Ammunition loaded to higher than normal pressure.
It denotes a type of 30 caliber ammunition adopted by the Military in 1906.
The types of ammunition that can be bouoght at CCI Ammunition has no limits because they list thousands of sellers that provide every type of ammunition to the consumer for their convenience.