It means the firearm can fire .22 Short, .22 Long, or .22 Long Rifle cartridges.
Assuing you mean a Winchester 190, it holds 15 22LR cartridges
Usually caliber and/or serial numbers.
Most of the numbers are the serial number.
Do you mean a Pattern 1917 rifle that has been rechambered to one of the .300 cartridges (and if so, which?)? sales@countrygunsmith.net
=What the does grain mean?=
Cartridges
The different numbers of HP deskjet ink is referring to the different model numbers of the HP deskjet printers. It is important to have the numbers on the ink be the same as the printer or ink cartridges will not fit in the HP deskjet printer.
All parts are stamped with the exact same serial number, indicating that they're all original to the rifle.
they can refer to year adopted, case length, bullet diameter, etc..
If you mean a Remington 512 X Sportsmaster, no. It is for .22 Short, Long, Long rifle cartridges. The .22 magnum is longer, larger in diameter and more powerful.
It means use only .22 long rifle cartridges and not .22 long or .22 short cartridges. With the shorter shells, the gun may try to move two cartridges from the magazine to the chamber at once and jam. They will probably not have enough energy to operate the autoloading mechanism correctly either.