A headstamp marking method has the steps of fabricating a plurality of inventory cases, each of them being identical with a round surface, a bare metal head, and a body, and the cases being suitable for different caliber cartridges. The method then has trimming or necking the cases, selecting cases for manufacturing into cartridges, and inscribing, via a laser inscription device, the cases upon their heads. The laser inscription identifies at least the caliber of the cartridge and the number of the cases for manufacturing. The laser inscription device, while removing material of the head along its path, attains insufficient heat and thus avoids compromising the structure of the cartridges and igniting them. The laser inscription device aims and focuses its laser upon a common plane of a head while exhausting its heat through the material ejected from the head.
A gas favoring boattail projectile has a body, a nose extending from the body as an ogive, a tip upon the nose, a meplat of the tip, a frustum outwardly of the body and opposite the nose, and a base opposite the tip. The frustum also appears as a boattail and the body appears as a cylinder. The projectile has a caliber denoting its widest diameter and serving as the basis for additional dimensions measured from it. The meplat has a proportional relationship to the boattail and the boattail has an angular relationship to the surface of the cylinder. The relationships of specific features of the invention optimize its accuracy on target while remaining within weight and other specified parameters.
A method of manufacturing cartridge cases, wherein the method comprises fabricating a plurality of substantially identically sized and shaped unmarked inventory cases suitable for use in manufacturing a plurality of different caliber cartridges and selecting a number of the plurality of the unmarked inventory cases to be used to manufacturing a selected one of the plurality different caliber cartridges. The method further comprises inscribing, via a laser inscription device, the selected number of unmarked inventory cases to identify at least the selected one of the plurality of different caliber cartridges the selected number of unmarked inventory cases are to be used to manufacture.
A firearm including a receiver, a barrel, a breech bolt assembly, and a trigger assembly. The bolt assembly has a bolt including a body portion, a lug portion, and a firing pin bore. The lug portion includes outward extending lugs, a cartridge recess, and an off-center hole. The bolt assembly also includes an extractor and an ejector pin. At least some of the lugs on the lug portion of the bolt have a tapering outer face so that a rearward face of the respective lug is taller than a forward face of the respective lug. In another aspect, at least some of the lugs on the lug portion of the bolt have tapering side faces so that a rearward face of the respective lug is wider than a forward face of the respective lug.
F41A 3/14 - Mécanismes à verrous rigides, c. à d. les éléments de verrouillage formant un assemblage rigide avec, respectivement, le bloc de culasse ou son levier de manœuvre, et le tube de l'arme ou la boîte de culasse
F41A 3/26 - Mécanismes à verrous rigides, c. à d. les éléments de verrouillage formant un assemblage rigide avec, respectivement, le bloc de culasse ou son levier de manœuvre, et le tube de l'arme ou la boîte de culasse les verrous tournant autour de l'axe du tube de l'arme, p.ex. verrous de culasse cylindriques rotatifs à action semi-automatique ou automatique, p.ex. le bloc de culasse comportant un support coulissant et une tête rotative
F41A 3/30 - Eléments de verrouillage, p.ex. tenons de verrouillage, filets de vis
B23P 6/00 - Remise en état ou réparation des objets
F41A 15/14 - Extracteurs de cartouche, c. à d. dispositifs pour retirer les cartouches ou les douilles au moins partiellement de la chambre de cartouche; Ejecteurs de cartouche, c. à d. dispositifs pour éjecter les cartouches ou les douilles retirées de l'arme à feu pour des armes à feu à culasse mobile axialement l'éjecteur étant monté sur ou dans le bloc de culasse
