Всякая новая тема - это хорошо забытая старая. И это правильно
Сюда - же:
"...There are six types of head which are:- rimmed, rimless, rebated, belted, belted rimless, rebated belted rimless.
A rimmed case has a flange around the head that is larger than the case body. Often used on a cartridge designed for revolvers or older rifles.
A rimless cartridge case has a "V" shaped groove around it's head and is the same diameter as the back end of the case. Often employed in self loading rifles and light machine guns.
A rebated rim cartridge is grooved in the same fashion as the rimless, but the grooved portion has a smaller diameter than the rest of the cartridge. Like rimless cartridges, these cartridges are mainly designed for automatic weapons.
Belted heads have a narrow raised portion just in front of where a rim would be if it had one, this thickened belt has been used in some big game calibres as a strengthening measure and in some pistols designed for use with "speed loaders".
Belted rimless is a combination of "belted" and "rimless" and is common on "magnum" calibres, where it helps withstand the stresses between base and case.
Rebated belted rimless is likewise a combination of "belted" and "rebated rimless".."
Эскизы в порядке описания:
Очень трудно искать черного добермана в темной комнате.
Особенно,если он там есть.