Betley magnum cartridge system

Abstract

The present disclosure provides a cartridge that modifies the .223 cases to achieve a cartridge length of 38.3 mm for use with a bullet (e.g., 110 g). The present cartridge system allows the use of a 30-caliber bullet to be used in an AR15 rifle/pistol platform. The decreased cartridge length optimizes the powder burn rate and pressure, which in turn has a greater effect on the ballistics of the round. The present system yields 300-400 ft/s higher velocity over the .300 Blackout in rifle length barrels and greater than 500 ft/s in shorter pistol barrels.

Claims

1. A rifle cartridge comprising: a case having a case length, wherein the case includes a neck portion, a shoulder portion, a body portion, and a base portion; wherein the shoulder portion joins the neck portion to the body portion and includes a first shoulder end adjacent to the neck portion having a diameter of about 8.48 mm and a second shoulder end adjacent to the body portion having a diameter of between, and including, 9.0 mm and 9.3 mm, wherein the case length is 38.3 mm, and wherein the base portion has a base diameter of 9.55 mm.

2. The rifle cartridge of claim 1, wherein the cartridge is compatible with an AR15 rifle.

3. The rifle cartridge of claim 1, wherein the cartridge is compatible with an AR10 rifle.

4. The rifle cartridge of claim 1, wherein the case houses a bullet, wherein the bullet has a diameter greater than 7.62 mm.

5. The rifle cartridge of claim 1, wherein the cartridge houses a 30 caliber bullet.

6. The rifle cartridge of claim 1, further comprising a gun powder including H110 powder, 1680 powder, or combinations thereof.

7. The rifle cartridge of claim 1, wherein the case includes brass.

8. The rifle cartridge of claim 1, wherein the base portion is rimless.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The drawing figures depict one or more implementations in accord with the present concepts, by way of example only, not by way of limitations. In the figures, like reference numerals refer to the same or similar elements.

(2) FIG. 1 is a schematic of an example of present cartridge system.

(3) FIGS. 2A-2B is a schematic of an example of present cartridge system, wherein FIG. 2B is a table of measurements corresponding to the variables in FIG. 2A.

(4) FIG. 3 is a photo of an example of the present cartridge system and a number of conventional cartridges.

DETAILED DESCRIPTION OF THE INVENTION

(5) The present disclosure includes a rifle cartridge. A cartridge is a type of ammunition packaging a projectile (e.g., bullet, shots, among others), a propellant substance (e.g., smokeless powder, black powder, among others), and a primer within a case (e.g., metallic, paper, plastic) that is made to fit within a barrel chamber of a firearm.

(6) As shown in FIGS. 1-2B, the modified cartridge 10 includes a case including a neck portion 12, a body portion 14, and a base portion 20. In an example, the neck portion 12 can include a taper, wherein the neck portion expands from a neck first end (E in FIG. 2A) to a neck second end (F in FIG. 2A), wherein the neck second end is adjacent to the shoulder portion 16. In an example, the neck diameter of the neck portion 12 can expand from 8.484 mm to 8.982 mm.

(7) The cartridge 10 can include a shoulder portion 16 joining the neck portion 12 to the body portion 14, wherein the shoulder portion 16 widens the diameter of the case from between 8.2 mm and 9.3 mm. For example, the shoulder 16 can expand the diameter from 8.484 mm to 9.192 mm, 8.8 mm to 9.2 mm, and/or from 8.982 mm to 9.161 mm. In an example, the shoulder 16 can include a shoulder first end (F in FIG. 2A) and a shoulder second end (G in FIG. 2A), wherein the shoulder first end can have a diameter of 8.920 mm and the shoulder second end can have a diameter of 9.161 mm. In an example, the shoulder first end includes a diameter of 8.982 mm and the shoulder second end can have a diameter of 9.161 mm.

(8) The cartridge 10 can have a case length (A in FIG. 2A) between 38.0 mm to 39.0 mm, 38.25 mm to 38.35 mm, e.g., 38.3 mm.

(9) The body portion 14 can include a taper in diameter. In an example, a body first end of the body portion of the case can have a diameter of 9.161 (G in FIG. 2A) to a body second end (H in FIG. 2A) can have a diameter of 9.6 mm. In an example, the body first end can have a diameter of 9.192 mm and the second end of the body portion close to the base of the cartridge can have a diameter of 9.548 mm. As such, the body portion of the case slightly tapers from the base of the case to the first end of the case body.

(10) The case diameter at the base 20 (i.e., base diameter) can be between, and including, 9.0 and 9.8 mm, between 8.43 mm to 9.60 mm, for example, 9.6 mm, 9.55 mm. In an example, the case can include a base diameter substantially similar to a base diameter of the .223 Remington or the 5.56 mm NATO cartridge.

(11) In an example, the cartridge is a rimless, bottleneck. The bullet diameter can be 0.308 in (7.8 mm), the neck diameter can be 0.334 in (8.5 mm), the base diameter can be 0.376 in (9.6 mm), the rim diameter can be 0.378 in (9.6 mm). The length of the case can be 1.508 in (38.3 mm). The maximum average pressure for the cartridge can be 379.2 MPa (55,000 psi).

(12) With respect to the headspace in a cartridge, with a rimmed cartridge the headspace is at the top of the rim where the cartridge sits in the chamber. With a rimless bottleneck cartridge, the case of the cartridge is actually tapered ever so slightly from the bottom of the case to just below where the neck begins and so the entire case seats against the chamber and this is where the headspace is measured. Therefore, the headspace tolerance can be very tight, less than .002 inches.

(13) In an example, the base portion 20 of the case body can connect to the body portion 14 via an indentation 18. The indentation 18 can be at an angle between 25-26°, wherein the indentation angle is measured from a longitudinal axis of the case body. The diameter of the base portion can be between, and including, 8.43 mm to 9.7 mm, for example, 8.43 mm, 8.48 mm, 9.60 mm, or 9.85 mm.

(14) In an example, the present cartridge can be formed by modifying the 300 Blackout/Whisper from 35 mm to 38.3 mm, or the 300 Super from 38 mm to 38.3 mm, wherein the original case length of 45 mm of the .223 is shortened to 38.3 mm.

(15) In an example, the rifle cartridge includes a brass case and a lead and copper bullet. The system can include a primer, such as a cupped piece of tin, that explodes when it is struck and smokeless powder that burns at different rates depends on the powder chosen. The case is commonly made of brass because it is resistant to corrosion. The brass case head can be work-hardened to withstand the high pressures of cartridges, and allow for manipulation via extraction and ejection without tearing the metal.

(16) In an example, the cartridge can be used with any appropriate bullet. In an example, the bullet weight can be from 110 g to 240 g. The maximum cup pressure can be 55,000 psi.

(17) The present disclosure focuses on the use of the cartridge system using an AR15 owing to the AR15's popularity with military, law enforcement, and hunters. However, the present cartridge system can be used in any legally made rifle or pistol that has a barrel chambered for the present cartridge, e.g., an AR15 rifle or pistol. The present cartridge can work in any configuration such as a bolt action, auto-loading, lever action, a hinged single shot, or even a revolver.

(18) The cartridge system can be used with a modified barrel. A barrel can be modified using a rough reamer and a finish reamer. The barrel can be mounted in a lathe, as the lathe spins the barrel, the reamer can be inserted to drill out the chamber. A go/no go gauge can be used for precision.

(19) The present cartridge system can be used in a small light weight rifle that can be maneuvered in tight places (e.g., cars) for both short and long range shots that would normally require a larger, heavier rifle and larger, heavier ammunition. As a result, only one rifle is necessary, instead of two separate rifles, one for short range and one for long range. For example, conventionally, one would need a .308 caliber rifle for long range shots that require an AR10 platform, which is much heavier and has more recoil. A second rifle is required conventionally with a pistol length barrel and subsonic loads for short range situations, which is why the 300 Blackout was developed. With the present system, one can use a single rifle with a short barrel for both subsonic and supersonic loads, and use a single ammunition type with half the weight and 30% less bulk.

(20) In an example, the system can include a modified .223 cartridge. The length of the .223 case can be reduced from 45 mm to 38.3 mm. The neck of the .223 cartridge can be resized to fit the 30 caliber bullet, which is then loaded into the empty case with new primer, powder, and bullet using a reloading machine. In an example, the system includes manufacturing the present cartridge without modifying an existing cartridge.

(21) The present system can include .223 brass instead of 5.56 brass, wherein the .223 brass results in a more reliable cartridge system. In an example, the system includes H110 powder and 1680 powder in combination with .223 brass. In an example, for heavier bullets over 200 g, the 1680 powder is used. For bullets under 200 g, the H110 powder can be used.

(22) The present cartridge system can include a bore diameter of 7.6 mm (0.300 inches) and a groove diameter of 7.8 mm (.308 in). The system can include a six-groove barrel with each groove being 2.8 mm (0.110 in) wide.

(23) FIG. 3 is a photo of the present cartridge system as well as a number of conventional bullet systems. From left to right, the bullets include: .223 Remington 30, 300 Blackout 32, 300 Betley Magnum (the present cartridge system) 10, 6.8 Remington spc 34, 30 Remington ar 36, and .308 Winchester 38.

(24) In an example, in the present system, one can pull two pins on the rifle to remove the upper (the upper portion of the rifle including the chamber and barrel but not the trigger) and remove the 223/556 or even the Blackout and replace it with the upper chambered for the present 300 Betley Magnum in less than 60 seconds and very inexpensively depending on the quality of components being used for the new upper. Most military, police, and hunters use guns that have a trigger system wherein it is advantageous to be able to change the upper while leaving everything else the same including the magazines.

Examples

(25) The present examples use two different chronographs to eliminate variability of the equipment. The data for the present cartridge is from an AR15 rifle having a 16″ 5R barrel with 11:1 twist rifling. The data for the other cartridges came from the Hornady Handbook which is the source for ammunition ballistics.

(26) TABLE-US-00001 TABLE 1 Cartridge Bullet Weight Velocity Whisper/Blackout 135 g 2000 ft/s Whisper/Blackout 155 g 1800 ft/s Whisper/Blackout 195 g 1500 ft/s .308 135 g 2900 ft/s .308 155 g 2600 ft/s .308 195 g 2300 ft/s 300 Betley Magnum 135 g 2450 ft/s 300 Betley Magnum 155 g 2400 ft/s 300 Betley Magnum 195 g 1600 ft/s 300 Betley Magnum 110 g 2335 ft/s (7″ barrel)

(27) As seen from the results in Table 1, the present cartridge system (300 Betley Magnum) provides for greater velocity than that of the Whisper/Blackout cartridge for each bullet weight, respectively. The present cartridge system has a lesser velocity than that of the .308 cartridge.

(28) As shown from the data, the present cartridge (300 Betley Magnum) has an advantage in its weight, bulk, ability to achieve subsonic speeds (and thereby suppress noise), and the ability to use short barrel guns.

(29) It should be noted that various changes and modifications to the embodiments described herein will be apparent to those skilled in the art. Such changes and modifications may be made without departing from the spirit and scope of the present invention and without diminishing its attendant advantages. For example, various embodiments of the systems and methods may be provided based on various combinations of the features and functions from the subject matter provided herein.