224 Valkyrie
Since 1976

New Products


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Un-Tapered (W/O Caliber Designation)(for "Wildcats")
1.780 - 1.810 O.A.L.
This brass is the same as our standard .223 Remington brass except that it has not been formed and has no caliber designation on the headstamp. It should work perfectly for most .223 Remington based wildcats. This brass has not been annealed, and will require a body anneal prior to forming, and possibly a neck anneal after forming, depending on how far it is necked down. Wall thickness at the mouth of this brass is approximately .009", which is the same as our .223 brass prior to forming (the walls will get thicker when formed down, and the case will also get longer). Length is approximately 1.800"

*Since this is a basic case, and Starline has no control over how it is formed, we accept no liability and offer no warranty in its use or your inability to properly form cases. Since this case has not been formed there may be more out-of-round mouths than normal.

Calibers that this could possibly be formed into: 6mm TCU, 6.5 TCU, 7mm TCU, 6x45mm, .25-45 Sharps, 6mm Mongoose, 7.62x40WT, 7Raptor, .357 MAX AR, etc.



Box Size:
•  250 ($90.00)

Status: Available Now

1.588 - 1.592 O.A.L.
The .224 Valkyrie was introduced in late 2017 by Federal. Unlike many calibers in the past that have been a joint effort between an ammo company and a single firearm company, the Valkyrie is already being chambered by several AR-15 manufacturers such as LaRue, JP Enterprises, and CMMG as well as several barrel makers.

The .224 Valkyrie is touted for its long range capabilities. While not the fastest factory .22 caliber AR chambering, its short fat case allows it to fit longer, high BC bullets. This means that it can keep a 90 grain Sierra bullet supersonic to 1300 yards, with much less recoil than other calibers. AR type rifles can be converted by changing the barrel and using a 6.8 SPC bolt and magazines.

Box Size:
•  250 ($103.00)
•  500 ($190.00)
•  1000 ($360.00)

Status: Available Now

6.5x39mm
1.508 - 1.512 O.A.L.
The 6.5 Grendel was designed for use in an AR-15 type rifle to offer ballistics similar to the .308 Winchester, with less recoil. This flat shooting round utilizes the inherently accurate, high ballistic coefficient 6.5mm diameter bullet. Its short case length allows it to use some of the longer, heavier match bullets, making this caliber one of the best choices for long range shooting out of an AR. With proper bullet selection, this caliber is no slouch in the field either, being suitable for deer-size game as well as varmint hunting.

Conversion of an AR to 6.5 Grendel requires a new bolt, barrel and magazines to feed the larger diameter cartridge. Several companies offer completed AR uppers and firearms, and reloading dies are readily available. Several manufacturers are now producing bolt action rifles in this caliber, many of which are built on “mini” actions, making for a lightweight rifle with plenty of range.

Our 6.5 Grendel brass uses the standard .080" flash hole as opposed to a few companies that use the .060" flash hole.

Box Size:
•  250 ($126.00)
•  500 ($235.00)
•  1000 ($430.00)

Status: Available Now

6mm Creedmoor Small pocket
1.908 - 1.912 O.A.L.

The SR 6mm CM is our small rifle primer version of the 6mm Creedmoor. Just like our SR 6.5 CM, we utilize the standard .080" flash hole diameter, as we feel this gives better ignition with slower burning and hard to ignite powders.*

The 6mm Creedmoor is the little brother to the very popular 6.5 Creedmoor. It has similar ballistics to the .243 Winchester, but its shorter length allows long, heavy bullets to be seated in the magazine. This caliber is an excellent choice for hunting, but its popularity was gained as a competition cartridge. Some of the new competitions, such as the Precision Rifle Series, require a lot of shooting and this cartridge is easy on the shoulder, even compared to the 6.5 Creedmoor. There are several companies now making bolt action and AR-10 type rifles for this caliber.

For the Large Primer Pocket version, please see our 6mm Creedmoor .

*As with all types of cases this large with small primer pockets, it will require care in powder and primer selection in cooler temperatures to prevent hang fires. Single-based propellents are generally easier to ignite and a quality primer such as the Remington 7 1/2 BR are recommended.



Box Size:
•  250 ($162.00)
•  500 ($295.00)
•  1000 ($552.00)

Status: Available Now

1.524 - 1.528 O.A.L.

The .277 Wolverine is a 5.56 NATO based wildcat that was designed to give near 6.8 SPC performance out of an AR-15 type rifle, without requiring a specialized bolt or magazines. Since the Wolverine only requires a barrel change, it is one of the most affordable AR conversions. This is touted as an all-purpose cartridge that not only gives excellent down range performance for its size, but it is also well suited to pistol or SBR, and subsonic/suppressed applications.


Barrels are available for Savage bolt actions and AR’s, as well as dies and other accessories from Mad Dog Weapons Systems www.maddogweapons.com.



Box Size:
•  250 ($85.00)
•  500 ($148.00)
•  1000 ($274.00)

Status: Available Now

1.710 - 1.730 O.A.L.
This brass is the same as our standard 6.8 SPC brass except that it has not been formed and has no caliber designation on the headstamp. It should work perfectly for most 6.8 SPC based wildcats. This brass has not been annealed, and will require a body anneal prior to forming, and possibly a neck anneal after forming, depending on how far it is necked down. Wall thickness at the mouth of this brass is approximately .009", which is the same as our 6.8 brass prior to forming (the walls will get thicker when formed down, and the case will also get longer). Length is approximately 1.720".

*Since this is a basic case, and Starline has no control over how it is formed, we accept no liability and offer no warranty in its use or your inability to properly form cases. We also recommend keeping pressures within SAAMI limits of the parent case. Since this case has not been formed there may be more out-of-round mouths than normal.

Calibers that this could possibly be formed into: American .30 BHW, .30 HRT, 6.5x6.8, 6.8 GPC, etc.

Box Size:
•  250 ($140.00)

Status: Available Now

6.8mm Remington SPC, 6.8 Remington
1.674 - 1.679 O.A.L.
The 6.8 SPC was designed for the military as a cartridge that landed between the 5.56mm NATO and the 7.62mm NATO to be used in the AR-15/M-4 platform. It loses very little magazine capacity versus the 5.56mm (25 vs. 30 rounds), but has better knockdown power without much more recoil.

This caliber works very well in short barreled rifles and is an easy conversion for an AR-15, requiring only a barrel, bolt, and magazine swap.

For someone looking for an AR-15 for hunting, this caliber is a logical choice, especially for recoil-sensitive shooters.

Our brass is safe to use in both 6.8 SPC and 6.8 SPC II chambers.

Box Size:
•  250 ($99.00)
•  500 ($185.00)
•  1000 ($350.00)

Status: Available Now

.308 Winchester "Palma", .308 Winchester Small Rifle
2.002 - 2.009 O.A.L.
The .308 Match is our small primer version of the .308 Winchester case. Many competitive shooters prefer the consistent velocities produced by small rifle primers. Like all of our other small primer rifle cases, we utilize our standard .080" flash hole diameter, as we feel it gives better ignition with slower burning and harder to ignite powders, making it more user friendly than many of the small primer/small flash hole versions of this caliber*.

For the Large Rifle Primer version, please see our .308 Win.

*As with all types of cases this large with small primer pockets, it will require care in powder and primer selection in cooler temperatures to prevent hang fires. Single-based propellents are generally easier to ignite and a quality primer such as the Remington 7 1/2 BR are recommended.

Box Size:
•  250 ($135.00)
•  500 ($256.00)
•  1000 ($484.00)

Status: Available Now

1.518 - 1.524 O.A.L.
The 7.62x39mm was developed in Russia as a mid-size military cartridge and is among the most widespread military cartridges used today. The AK47 and its variants, along with the SKS, have made this cartridge very popular in the civilian market due to the sheer number of affordable surplus firearms available. This caliber can also be had in AR-15 type rifles (requiring only a different bolt, barrel and magazine), as well as the Ruger Mini-30. Bolt action rifles are now available from companies such as CZ, Ruger, and Howa.

This close-medium range caliber is suitable for varmints and deer-size game when loaded with suitable expanding-type bullets.

Our brass is sized for use with the standard .311" diameter bullets, it will need to be neck sized if used with .308" diameter bullets.

Box Size:
•  250 ($102.00)
•  500 ($190.00)
•  1000 ($360.00)

Status: Available Now

0.761 - 0.766 O.A.L.

The .455 Webley MKII is a British revolver cartridge designed for their military in the late 1800's. This brass will work for all of the Webley MKII, MKIII,MKIV, MKV, and MKVI cartridges. The original MKI case is longer, but this will work as a short substitute for it. It is important to note that the Webley cartridges designations don't necessarily coincide with that model revolver, and smokless powder loads may not be safe in all revolvers.  

*It is important to note that many Webley revolvers in the US have been modified to use the much thicker rimmed .45 Auto Rim cartridge by machining the cylinder to accept the thicker rims. Firearms modified as such will not work with standard .455 MKII brass.



Box Size:
•  250 ($105.00)
•  500 ($194.00)
•  1000 ($372.00)

Status: Available Now

1.569 - 1.576 O.A.L.
The .458 HAM'R is a .458 SOCOM based caliber that was designed by Bill Wilson to push a 300 grain projectile 200fps faster than the SOCOM. Due to limitations of the bolt and extension of the AR-15, the .458 HAM'R is chambered in a hybrid AR platform that utilizes a larger diameter bolt and extension. This allows the .458 HAM'R to reach its full potential while still being a fairly lightweight carbine. Complete guns are available at Wilson Combat, and standard 458 SOCOM loading dies can be used when adjusted higher to acheive the proper headspace.

Box Size:
•  250 ($195.00)
•  500 ($350.00)
•  1000 ($670.00)

Status: Available Now

1.616 - 1.612 O.A.L.
The .500 Auto Max was designed by Big Horn Armory for use in their AR500 rifle, which is based on the AR-10 sized platform. The .500 Auto Max is essentially a rimless .500 S&W Magnum.  It is a very versatile cartrige; it can handle anything from prairie dogs to pachyderms to Peterbilts, truck stopping power in a platform weighing less than 10 pounds.  The .500 Auto Max uses the same reloading dies, shell holders & load data as the .500 S&W Mag, with the exception of requiring a taper crimp instead of the standard roll crimp. This is due to the Auto Max headspacing off of the mouth of the case instead of the rim.
Firearms are available Big Horn Armory.

Box Size:
•  250 ($199.00)
•  500 ($315.00)
•  1000 ($540.00)

Status: Available Now

6 Creedmoor, 6 CM
1.908 - 1.912 O.A.L.

The 6mm Creedmoor is the little brother to the very popular 6.5 Creedmoor. It has similar ballistics to the .243 Winchester, but its shorter length allows long, heavy bullets to be seated in the magazine. This caliber is an excellent choice for hunting, but its popularity was gained as a competition cartridge. Some of the new competitions, such as the Precision Rifle Series, require a lot of shooting and this cartridge is easy on the shoulder, even compared to the 6.5 Creedmoor. There are several companies now making bolt action and AR-10 type rifles for this caliber.

For the Small Rifle Primer of this caliber, please see our SR 6mm CM.



Box Size:
•  250 ($132.00)
•  500 ($247.00)
•  1000 ($460.00)

Status: Available Now

Un-tapered (W/No caliber designation)
1.540 - 1.560 O.A.L.
This brass is the same as our standard 6.5 Grendel brass except that it has not been formed and has no caliber designation on the headstamp. It should work for most 6.5 Grendel and 7.62x39mm based wildcats. This brass has not been annealed, and will require a body anneal prior to forming, and possibly a neck anneal after forming, depending on how far it is necked down. Wall thickness at the mouth of this brass is approximately .009", which is the same as our 6.5 Grendel brass prior to forming (the walls will get thicker when formed down, and the case will also get longer). Length is approximately 1.550"

*Since this is a basic case, and Starline has no control over how it is formed, we accept no liability and offer no warranty in its use or your inability to properly form cases. Since this case has not been formed there may be more out-of-round mouths than normal.

Our Grendel Basic case can be formed into 6.5 Grendel and 7.62x39 based wildcats such as the .22-6.5 Grendel, 6mm Grendel, 243 LBC and 9x39mm.

Box Size:
•  250 ($180.00)

Status: Available Now


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