224 Valkyrie
Since 1976

New Rifle Calibers




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.222 Rem, Triple Deuce
1.687 - 1.693 O.A.L.
The .222 Remington was introduced in 1950 and quickly became the favorite caliber of many shooters and hunters. The "Triple Deuce" found a lot of success as a benchrest caliber due to its inherent accuracy and the small caliber/high velocity combination made it a great choice for all types of varmint hunting. While the .222 Remington has slipped in popularity to calibers such as the .223 Remington, it is still available from several rifle manufacturers and is just as capable of a cartridge as it ever was.

Box Size:
•  250 ($90.00)
•  500 ($160.00)
•  1000 ($300.00)

Status: Available Now

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

.223 Rem, .223, 5.56, 5.56mm Nato, 5.56x45mm
1.745 - 1.750 O.A.L.
The .223 Remington is one of the most widely used centerfire cartridges today. Tracing its roots back to the .222 Remington, the .223 was designed to achieve certain ballistics for military use. The .223 Remington, when in its military form, is known as the 5.56x45mm NATO. The differences between the two being the pressures that they are loaded at and the chamber in the firearm itself.

The .223 has established itself as an excellent varmint and target caliber. It dominates all other rifle calibers in competitions such as 3-gun, and has a dedicated following in several other sports due to its low recoil and accuracy potential. Those two attributes coupled with good velocity allow it to excel as a varmint gun also.

When loaded at .223 Remington pressures, our brass is safe to use in any firearm chambered for .223 or 5.56x45mm. If loaded to 5.56 pressures, you need to use firearms labeled for use with 5.56mm. It can be unsafe to fire 5.56mm ammunition in firearms with a .223 Remington chamber.

Box Size:
•  250 ($62.50)
•  500 ($115.00)
•  1000 ($210.00)

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 such as Satern and Lothar-Walther.

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

.243 Winchester, 243, 6×52mm
2.033 - 2.038 O.A.L.
Introduced in 1955 by Winchester, the .243 Winchester is one of the most popular and versatile cartridges available.  Derived from the .308 Winchester, the .243's low recoil and flat trajectory make it an excellent all around cartridge.  Due to a wide bullet selection being readily available, the .243 can be applied just as well on the shooting bench looking over prairie dog town as it can waiting for a whitetail from 15’ up a tree.  The 243’s accuracy potential is excellent making it a popular choice of competitive shooters.

Box Size:
•  250 ($124.00)
•  500 ($228.00)
•  1000 ($416.00)

Status: Available Now

**6.5-08, **6.5-08 A-Square, .260 Rem
2.023 - 2.028 O.A.L.
Introduced in 1997, the .260 Remington is another wildcat turned commercial cartridge. Utilizing a 6.5mm (.264") diameter bullet, the .260 has a lot less recoil than its .308 parent case, but shoots much flatter. This has made it very popular in many shooting sports, and makes it an excellent choice for hunting in much of the U.S.

** As with all commercialized wildcat cartridges, minor variations in Pre-SAAMI chambers may not headspace properly or may have clearance issues with SAAMI spec brass

Box Size:
•  250 ($148.00)
•  500 ($280.00)
•  1000 ($530.00)

Status: Available Now

6.5mm CM, 6.5mm Creedmoor
1.908 - 1.912 O.A.L.
The 6.5 Creedmoor was designed as a target caliber in 2007 by Hornady but has become an extremely popular hunting caliber as well. While it isn't as long as some of the other 6.5 caliber short action calibers, such as the .260 Remington, the Creedmoor utilizes a 30° shoulder and very little body taper to help it achieve similar ballistics. The shorter length also gives it more versatility as far as bullet seating depth is concerned. Almost every major rifle company offers either a bolt-action rifle or a modern sporting rifle in the 6.5 Creedmoor due to its versatility and inherent accuracy.

Our 6.5 Creedmoor brass uses a Large Rifle Primer. This is the standard for this round and it is what many prefer due to its reliable ignition no matter what temperature you are shooting in or the burn rate of your powder. For the Small Rifle Primer version, please see our SR 6.5 CM case.

Box Size:
•  250 ($125.00)
•  500 ($235.00)
•  1000 ($430.00)

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

Small Primer 6.5 Creedmoor
1.908 - 1.912 O.A.L.
This is our Small Rifle Primer version of the 6.5 Creedmoor. The 6.5 Creedmoor was designed as a target caliber in 2007 by Hornady but has become an extremely popular hunting caliber as well. While it isn't as long as some of the other 6.5 caliber short action calibers, such as the .260 Remington, the Creedmoor utilizes a 30° shoulder and very little body taper to help it achieve similar ballistics. The shorter length also gives it more versatility as far as bullet seating depth is concerned. Almost every major rifle manufacturer offers either a bolt-action rifle or a modern sporting rifle in 6.5 Creedmoor caliber due to its versatility and inherent accuracy.

Our SR6.5CM brass uses a Small Rifle Primer. Many target shooters prefer the Small Primer for the increased consistency and accuracy. While other small pocket manufacturers use a smaller than standard flash hole, Starline uses our standard .080" flash hole, as we feel that it gives better ignition with some of the slower powders and in cooler conditions* (and you won't be breaking off decapping pins either!)The Small Primer version also maintains primer pocket size much better than the large primer version under higher pressures. For our Large Primer version please see our 6.5 Creedmoor case.

*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 ($150.00)
•  500 ($280.00)
•  1000 ($510.00)

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

**7mm/.308, 7mm-08 Rem
2.023 - 2.028 O.A.L.
While the 7mm-08 Remington was first commercially manufactured in the early 80's, its roots can be traced back to the late 50's as a popular wildcat cartridge.

This flat shooting, mild recoiling caliber has a devout following of both hunters and competition shooters. The wide selection of 7mm (.284") caliber bullets makes it a very flexible cartridge. It is widely available in both semi-auto and bolt action rifles as well as several single-shots and a few pistols.

**As with all commercialized wildcat cartridges, minor variations in Pre-SAAMI chambers may not headspace properly, or may have clearance issues with SAAMI spec brass.

Box Size:
•  250 ($112.50)
•  500 ($210.00)
•  1000 ($390.00)

Status: Available Now

.300 AAC Blackout, .300 BLK, 7.62x35mm
1.356 - 1.360 O.A.L.
The .300 Blackout is based off of a shortened 5.56x45mm case that is necked to .30 caliber. For AR-15 platform rifles and pistols it only requires changing the barrel to go from 5.56 to .300 Blackout. The Blackout's main purpose is to be used at subsonic velocities in suppressed firearms. Many bolt action and single shot rifles are now being produced in this caliber as well.

Box Size:
•  250 ($70.00)
•  500 ($130.00)
•  1000 ($240.00)

Status: Available Now

.30 WCF
2.027 - 2.033 O.A.L.

Introduced in early 1895 for the Winchester Model 1894 lever-action rifle, the .30-30 was the USA's first small-bore, sporting rifle cartridge designed for smokeless powder. Jacketed bullets for the .30-30 are .308 inches in nominal diameter. Cast lead bullets for the .30-30 are also popular and usually are .309 inches in diameter.


The .30-30 is considered to be the "entry-class" for modern big-game hunting cartridges. While it is very effective on deer-sized and black bear-sized game, most commercial loadings are limited in effective range to about 200 yd for that purpose, except when using ballistic-tip ammunition. The cartridge is typically loaded with bullets weighing between 150 and 170 grains but lighter loads are possible. Bullets of up to 180 gr can be used, but the overall length restrictions of the lever-action rifles most commonly chambered for this round limit their usefulness.



Box Size:
•  250 ($87.00)
•  500 ($162.00)
•  1000 ($310.00)

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

.308 Winchester, .308, 7.62mm Nato, 7.62x51mm
2.002 - 2.009 O.A.L.



The venerable .308 Winchester has made quite a name for itself since it was first introduced in 1952. The .308 and its military equivalent, the 7.62x51mm Nato, is a very efficient cartridge that has excellent ballistics, while still being fairly easy on the shoulder. That, and its inherent accuracy have kept it thriving as both a competition and hunting caliber.

For the Small Rifle Primer version of our .308 Win, please see our .308 Match.

Box Size:
•  250 ($116.00)
•  500 ($199.00)
•  1000 ($376.00)

Status: Available Now

7.62x39mm Soviet, 7.62x39
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

(.338-08**)
1.998 - 2.003 O.A.L.
One of the newest members of the .308 Winchester family, the .338 Federal was introduced in 2006 by Federal and Sako. It is capable of acheiving the same muzzle energy as some magnum calibers with less recoil.  It also fits in standard length short action rifles and AR-10's without sacrificing magazine capacity.  It hits harder than the .308, and shoots flatter than the .358 Winchester, making it an excellent choice for a close to mid-range hunting caliber.  One thing to consider when selecting hunting bullets for the .338 Federal is that most bullets available in .338 caliber were designed
for higher velocity cartridges.  Generally bullets under 200 grains or ones specifically designed for it are your best option for hunting.  Check with your bullet manufacturer of choice for their recommendation.
**Not all .338-08 wildcats were chambered the same and may not headspace correctly with factory .338 Federal brass or ammunition.

Box Size:
•  250 ($145.00)
•  500 ($270.00)
•  1000 ($500.00)

Status: Available Now


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